US3506908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elimination of short circuit current of power transistors in push-pull inverter circuits
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1968-05-20
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Granted: 1970-04-14
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Expires: 1988-05-20
Abstract
No abstract record available.
Inventors
- 👤 Robert J Resch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:14
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H02M7/53803; H02M7/53806
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2785236A
Cited
US3351839A
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US3383624A
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US3317856A
Cited
US3350661A
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US3361952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |