US3436644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency modulated static inverter
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1966-07-29
•
Granted: 1969-04-01
•
Expires: 1986-07-29
Abstract
No abstract record available.
Inventors
- 👤 James E Murray
- 👤 Robert G Klimo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:41
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/539
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3155824A
Cited
US3205424A
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US3162724A
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US3242262A
Cited
US3225209A
Cited
US3297936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |