US2921165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical device
Assignee: Texas Instruments Inc
•
Filing: 1957-12-27
•
Granted: 1960-01-12
•
Expires: 1977-12-27
Abstract
No abstract record available.
Inventors
- 👤 David E Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:20
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/24; H01H71/2481; H01H71/2454; H01H71/2472
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE535664C
Cited
GB191329274A
Cited
US1691125A
Cited
US2014524A
Cited
AT151224B
Cited
DE666920C
Cited
US2813168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |