Patent US2948837A successfully refreshed from Google Patents.
US2948837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state electronic switch and circuits therefor
Assignee: McGraw Edison Co
•
Filing: 1956-09-04
•
Granted: 1960-08-09
•
Expires: 1976-09-04
Abstract
No abstract record available.
Inventors
- 👤 Robert H Postal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:41
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/70; H03K3/00; H03K3/02; H10; H10N; H10N70/00; H10N70/20; H10N70/25; H10N70/801; H10N70/881; H10N70/883; H10N70/8833; H10N70/8836
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1751460A
Cited
US1678825A
Cited
US2541832A
Cited
GB669611A
Cited
US2887632A
Cited
US2711496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |