US2663749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary cell
Assignee: Federal Telecommunication Laboratories Inc
•
Filing: 1951-08-29
•
Granted: 1953-12-22
•
Expires: 1971-08-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Warner
- 👤 Andre R Gobat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:22
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M50/00; H01M50/10; H01M50/172; H01M50/174; H01M50/179; H01M50/50; H01M50/502; H01M50/531; H01M50/538; H01M6/00; H01M6/04; H01M6/06; H01M6/10; H01M6/30; H01M6/32; H01M6/42; H01M6/44; H01M4/36; H01M4/58; H01M4/582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1297653A
Cited
US1587356A
Cited
GB248942A
Cited
US2050173A
Cited
USRE22053E
Cited
US2422046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |