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FR1003606A Expired / Lapsed FR ⏱️ 0.0 years remaining

Process for obtaining quartz crystals

Assignee: LE DIRECTEUR DU CT NAT D ETUDE
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Filing: 1947-01-31
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Granted: 1952-03-20
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Expires: 1967-01-31
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Abstract

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Bibliographic Details

Application Number —
Jurisdiction FR
Data Source google_patents
Last Synchronized 2026-11-07 19:09
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/01; H10N30/09; H10N30/093

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