FR1301149A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Process for the treatment of quartz crystals for optical applications and quartz crystals thus treated
Assignee: Koninklijke Philips NV
•
Filing: 1961-09-13
•
Granted: 1962-08-10
•
Expires: 1981-09-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-05 14:52
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/02; C; C03; C03C; C03C3/00; C03C3/04; C03C3/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.