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.)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV
Priority to FR821436ApriorityCriticalpatent/FR1254064A/fr
Application grantedgrantedCritical
Publication of FR1254064ApublicationCriticalpatent/FR1254064A/fr
G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
G02B1/02—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of crystals, e.g. rock-salt, semi-conductors
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Physics & Mathematics
(AREA)
Chemical & Material Sciences
(AREA)
Crystallography & Structural Chemistry
(AREA)
General Physics & Mathematics
(AREA)
Optics & Photonics
(AREA)
FR821436A1960-03-151960-03-15Cristaux de quartz et leur procédé de fabrication
ExpiredFR1254064A
(fr)