US3379955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for protecting the switching elements of static inverters from transient voltages
Assignee: Lockheed Martin Corp
•
Filing: 1964-11-17
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Granted: 1968-04-23
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Expires: 1984-11-17
Abstract
No abstract record available.
Inventors
- 👤 Philip W Koetsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:30
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/32; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/521
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3213287A
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US3222587A
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US3131343A
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US3262036A
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US3259827A
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US3321697A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |