US2961549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable power plant
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1958-08-29
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Granted: 1960-11-22
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Expires: 1978-08-29
Abstract
No abstract record available.
Inventors
- 👤 William M Shipitalo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:51
CPC Classifications
F; F01; F01K; F01K15/00; F01K25/00; F01K25/08; F01K25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |