BE799406A - Composes chromogenes - Google Patents

Composes chromogenes

Info

Publication number: BE799406A
Authority: BE; Belgium
Prior art keywords: chromogenic compounds; chromogenic; compounds
Prior art date: 1972-05-12

Application number

BE131004A

Other languages

English (en)

Inventor

S Farber

A J Wright

Original Assignee

Ncr Co

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.)

1972-05-12

Filing date

1973-05-11

Publication date

1973-08-31

1973-05-11 Application filed by Ncr Co filed Critical Ncr Co

1973-08-31 Publication of BE799406A publication Critical patent/BE799406A/fr

Links

239000003593 chromogenic compound Substances 0.000 title 1

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
- B41M5/132—Chemical colour-forming components; Additives or binders therefor
- B41M5/136—Organic colour formers, e.g. leuco dyes
- B41M5/145—Organic colour formers, e.g. leuco dyes with a lactone or lactam ring

Landscapes

Chemical & Material Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
General Chemical & Material Sciences (AREA)
Indole Compounds (AREA)
Color Printing (AREA)

BE131004A 1972-05-12 1973-05-11 Composes chromogenes BE799406A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US00252785A US3812146A (en)	1972-05-12	1972-05-12	Phthalide

Publications (1)

Publication Number	Publication Date
BE799406A true BE799406A (fr)	1973-08-31

Family

ID=22957539

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE131004A BE799406A (fr)	1972-05-12	1973-05-11	Composes chromogenes

Country Status (6)

Country	Link
US (1)	US3812146A (fr)
BE (1)	BE799406A (fr)
DE (1)	DE2322497C3 (fr)
ES (1)	ES414206A1 (fr)
FR (1)	FR2184699B1 (fr)
GB (1)	GB1379712A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3899511A (en) *	1971-08-30	1975-08-12	Polaroid Corp	Photographic processes and products employing benzindole phthaleins as optical filter agents
GB1467898A (en) *	1974-04-09	1977-03-23	Ciba Geigy Ag	Heterocyclic substituted lactone compounds their manufacture and use
US4075224A (en) *	1976-01-22	1978-02-21	Sterling Drug Inc.	3,5-Bis (indolyl)-5-(indolyl)-2(5H)-furanones
US4189171A (en) *	1977-03-01	1980-02-19	Sterling Drug Inc.	Marking systems containing 3-aryl-3-heterylphthalides and 3,3-bis(heteryl)phthalides

1972
- 1972-05-12 US US00252785A patent/US3812146A/en not_active Expired - Lifetime
1973
- 1973-04-30 ES ES414206A patent/ES414206A1/es not_active Expired
- 1973-05-02 GB GB2083673A patent/GB1379712A/en not_active Expired
- 1973-05-04 DE DE2322497A patent/DE2322497C3/de not_active Expired
- 1973-05-11 FR FR7317040A patent/FR2184699B1/fr not_active Expired
- 1973-05-11 BE BE131004A patent/BE799406A/fr not_active IP Right Cessation

Also Published As

Publication number	Publication date
GB1379712A (en)	1975-01-08
DE2322497C3 (de)	1979-02-15
FR2184699A1 (fr)	1973-12-28
FR2184699B1 (fr)	1978-08-04
US3812146A (en)	1974-05-21
DE2322497A1 (de)	1973-11-29
DE2322497B2 (de)	1978-06-22
ES414206A1 (es)	1976-05-01

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Legal Events

Date

Code

Title

Description

1985-11-30

RE

Patent lapsed

Owner name: APPLETON PAPERS INC.

Effective date: 19850511