EP1918480A3 - Handlauf mit daran/darin befindlichen elektrischen Lichtquellen - Google Patents

Handlauf mit daran/darin befindlichen elektrischen Lichtquellen Download PDF

Info

Publication number
EP1918480A3
EP1918480A3 EP07116754.8A EP07116754A EP1918480A3 EP 1918480 A3 EP1918480 A3 EP 1918480A3 EP 07116754 A EP07116754 A EP 07116754A EP 1918480 A3 EP1918480 A3 EP 1918480A3
Authority
EP
European Patent Office
Prior art keywords
handrail
illumination sources
sources provided
profile
electric illumination
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07116754.8A
Other languages
English (en)
French (fr)
Other versions
EP1918480A2 (de
EP1918480B1 (de
Inventor
Burkhard Ehnes
Julian Lonsdale
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP1918480A2 publication Critical patent/EP1918480A2/de
Publication of EP1918480A3 publication Critical patent/EP1918480A3/de
Application granted granted Critical
Publication of EP1918480B1 publication Critical patent/EP1918480B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/18Balustrades; Handrails
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/18Balustrades; Handrails
    • E04F2011/1868Miscellaneous features of handrails not otherwise provided for
    • E04F2011/1872Miscellaneous features of handrails not otherwise provided for illuminated

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Steps, Ramps, And Handrails (AREA)

Abstract

Die Erfindung betrifft einen Handlauf mit daran/darin befindlichen elektrischen Lichtquellen 14. Der Handlauf ist von einem Hohlprofil 1 gebildet, das aus mindestens zwei verbindbaren Teilprofilen 2, 3 besteht. Das untere Teilprofil 3 ist mit dem oberen Teilprofil 2 einerseits durch ein Scharnier 10 und andererseits durch eine Rastverbindung 11, 12 verbunden, die ein Öffnen und ein Wiederverschließen des Hohlprofils 1 ermöglichen. An dem unteren Teilprofil 3 befinden sich Basisplatinen 13 mit LEDs 14 sowie entsprechende Betriebsgeräte 17.
EP20070116754 2006-11-03 2007-09-19 Handlauf mit darin befindlichen elektrischen Lichtquellen Not-in-force EP1918480B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200620016860 DE202006016860U1 (de) 2006-11-03 2006-11-03 Handlauf mit daran/darin befindlichen elektrischen Lichtquellen

Publications (3)

Publication Number Publication Date
EP1918480A2 EP1918480A2 (de) 2008-05-07
EP1918480A3 true EP1918480A3 (de) 2013-08-14
EP1918480B1 EP1918480B1 (de) 2014-11-12

Family

ID=38596889

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070116754 Not-in-force EP1918480B1 (de) 2006-11-03 2007-09-19 Handlauf mit darin befindlichen elektrischen Lichtquellen

Country Status (2)

Country Link
EP (1) EP1918480B1 (de)
DE (1) DE202006016860U1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006119642A1 (en) 2005-05-12 2006-11-16 Alexandre De La Chevrotiere Moment-resisting joint and system
CA2688813C (en) 2008-10-06 2021-09-14 Alexandre De La Chevrotiere Structural assembly for constructing bridges and other structures
DE102008055790B4 (de) * 2008-11-04 2010-08-19 Gernot Schneider Schutzleiste
DE102009042257A1 (de) 2009-09-22 2011-04-21 Welser Profile Gmbh Handlauf mit integrierten Leuchtmitteln
AU2010100807A4 (en) * 2010-06-29 2010-08-26 Klik Systems Australia Pty Ltd Lighting Assembly and Method
DE202012102636U1 (de) 2012-07-16 2012-11-06 Edelstahlverarbeitung Schmitt GmbH Handlauf mit Leuchtelementen und anderen technischen Elementen
DE102012106399A1 (de) 2012-07-16 2014-01-30 Edelstahlverarbeitung Schmitt GmbH Handlauf mit Leuchtelementen und anderen technischen Elementen
US10386183B2 (en) * 2017-04-07 2019-08-20 Diamond Tech LLC Level with slotted engagement of full width bindings
HRP20211713T1 (hr) * 2018-03-20 2022-02-18 René Bangratz Sustav profila s lakom nosivom tračnicom
CN108560844B (zh) * 2018-06-13 2023-11-14 广东工业大学 一种用于楼梯扶手的辅助扶手
US11333310B2 (en) 2020-04-27 2022-05-17 Intense Lighting, Llc Point source light assembly
KR20240087724A (ko) * 2021-08-30 2024-06-19 바이센본 에이/에스 레일링 시스템, 레일링 시스템을 조립하기 위한 방법, 및 레일링 시스템의 용도

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH341853A (de) * 1956-04-18 1959-10-31 Menziken Aluminium Ag Handlauf mit Innenbeleuchtung für Geländer
DE7214124U (de) * 1972-08-10 Noryd Nils E Handlauf mit Halterung
US6145996A (en) * 1998-03-06 2000-11-14 Shimada Enterprises, Inc. Theater lighting system
JP2005213862A (ja) * 2004-01-29 2005-08-11 Sekisui Chem Co Ltd 手摺り構造

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE865527C (de) * 1951-06-08 1953-02-02 Weipert & Co G M B H Handlauf fuer Gelaender und Wandungen, insbesondere an Treppenaufgaengen
GB881445A (en) * 1959-04-10 1961-11-01 Aluminium A G Menziken Improvements in or relating to illuminated handrails
CH421462A (de) * 1965-04-22 1966-09-30 B A G Bronzewarenfabrik Ag Tur Handlauf
DE2334068A1 (de) * 1973-07-04 1975-01-16 Gantenbrink Leuchten Ohg Handlauf
DD140267A1 (de) * 1978-12-05 1980-02-20 Karl Mueller Handlauf mit beleuchtungseinrichtung
JPH11141088A (ja) * 1997-11-12 1999-05-25 Kowa Sangyo Kk 発光体を有する手摺
DE20206284U1 (de) * 2002-04-20 2002-07-18 Kunzweiler, Wolfgang, 79576 Weil am Rhein Handlauf
DE10318723A1 (de) * 2003-04-25 2004-11-11 Müller, Gerhard Beleuchtbarer Handlauf
DE10353523A1 (de) * 2003-11-14 2005-06-23 Gerhard Glaser Geländerelement mit Beleuchtung
DE202004002248U1 (de) * 2004-02-12 2004-04-15 Glockner, Dieter Handlauf mit Beleuchtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7214124U (de) * 1972-08-10 Noryd Nils E Handlauf mit Halterung
CH341853A (de) * 1956-04-18 1959-10-31 Menziken Aluminium Ag Handlauf mit Innenbeleuchtung für Geländer
US6145996A (en) * 1998-03-06 2000-11-14 Shimada Enterprises, Inc. Theater lighting system
JP2005213862A (ja) * 2004-01-29 2005-08-11 Sekisui Chem Co Ltd 手摺り構造

Also Published As

Publication number Publication date
DE202006016860U1 (de) 2008-03-06
EP1918480A2 (de) 2008-05-07
EP1918480B1 (de) 2014-11-12

Similar Documents

Publication Publication Date Title
EP1918480A3 (de) Handlauf mit daran/darin befindlichen elektrischen Lichtquellen
EP2288566B1 (de) Handlauf für eine fahrtreppe oder einen fahrsteig
EP2322847A3 (de) Variables LED-downlight
EP1764447A3 (de) Stossverbinder für Holz-/Aluminiumfassaden
EP1961580A3 (de) Spitze für Schreib-, Zeichen- und/oder Markiergeräte
EP2256887A3 (de) Geschlossener Kabelkanal
EP2546565A3 (de) Deckenaufhellungsnut
DE202016101438U1 (de) In zwei Richtungen leuchtende Lampenvorrichtung und in zwei Richtungen leuchtendes Lampensystem
EP1517080A3 (de) Leuchte
EP1571070A3 (de) Verbundbauteil
EP1755170A3 (de) Solarzellenverbund und Solareinheit aufweisend den Solarzellenverbund
EP2407708A3 (de) Selbstausrichtende Stehleuchte
EP2040278A3 (de) Elektrischer Schalter
EP2037061A3 (de) Türbeschlag
EP2060793A3 (de) Vakuumpumpe
EP1555923A1 (de) Duschabtrennung mit beleuchtung
EP1302717A3 (de) Langgestreckte Leuchteneinrichtung
EP2339227A3 (de) Anbauleuchte
EP1344867A3 (de) Unterflurleuchte
EP2322734A3 (de) Lichtdecke
EP1596135A3 (de) Haushaltsgerätetür
EP2364059A3 (de) Vorrichtung mit mehreren elektrisch in Serie geschalteten Leuchtmitteln
EP2674560A3 (de) Fenster oder Tür mit Antriebsvorrichtung
DE202010005910U1 (de) Beleuchtungsvorrichtung, insbesondere zum Umrüsten bestehender Leuchten auf LED-Technik
EP1873333A3 (de) Mehrteiliger Schlüssel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

RIC1 Information provided on ipc code assigned before grant

Ipc: E04F 11/18 20060101AFI20130708BHEP

17P Request for examination filed

Effective date: 20140204

RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

INTG Intention to grant announced

Effective date: 20140401

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20140507

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

INTG Intention to grant announced

Effective date: 20140912

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: CH

Ref legal event code: NV

Representative=s name: FIAMMENGHI-FIAMMENGHI, CH

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 695882

Country of ref document: AT

Kind code of ref document: T

Effective date: 20141115

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502007013565

Country of ref document: DE

Effective date: 20141231

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20141112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150312

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150312

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502007013565

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

26N No opposition filed

Effective date: 20150813

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150919

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150919

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20160926

Year of fee payment: 10

Ref country code: GB

Payment date: 20160930

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20160928

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20070919

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141112

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20170919

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20180531

REG Reference to a national code

Ref country code: DE

Ref legal event code: R084

Ref document number: 502007013565

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170919

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171002

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20180927

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20190930

Year of fee payment: 13

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 695882

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190919

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190919

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502007013565

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210401