FR716428A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Process and products for obtaining direct positives
Assignee: Schering Kahlbaum AG
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Filing: 1931-05-01
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Granted: 1931-12-21
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Expires: 1951-05-01
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
2026-11-02 17:02
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08
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