FR863089A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Process for producing photographic contrasts using a diazo compound
Assignee: Koninklijke Philips NV
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Filing: 1940-01-26
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Granted: 1941-03-22
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Expires: 1960-01-26
Abstract
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Inventors
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Bibliographic Details
Application Number
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Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 18:03
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016
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