FR2083418B1
Expired / Lapsed
FR
⏱️ 0.0 years remaining
FR2083418B1 - - Google Patents
Assignee: AT&T Inc
•
Filing: 1971-03-18
•
Granted: 1974-08-19
•
Expires: 1991-03-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-27 08:26
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/122; G02B6/1221; G02B6/02; G02B6/02057; G02B6/02076; G02B6/02114; G02B6/02123; G02B6/13; G02B6/138; G02B6/24; G02B6/26; G02B6/28; G02B6/2804; G02B6/2821; G02B6/30; G03; G03F; G03F7/00; G03F7/0005; G03F7/001; G03F7/004; G03F7/038
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.