Patent US3538347A successfully refreshed from Google Patents.
US3538347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable clamp circuit
Assignee: General Electric Co
•
Filing: 1967-04-20
•
Granted: 1970-11-03
•
Expires: 1987-04-20
Abstract
No abstract record available.
Inventors
- 👤 Gaines T Spotts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:51
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2486208A
Cited
US2585854A
Cited
US2833980A
Cited
US2952006A
Cited
US3070712A
Cited
US3069618A
Cited
US3235791A
Cited
US3207952A
Cited
US3379959A
Cited
US3407260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |