Patent US2923245A successfully refreshed from Google Patents.
US2923245A
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Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1954-03-17
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Granted: 1960-02-02
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Expires: 1974-03-17
Abstract
No abstract record available.
Inventors
- 👤 Leslie L Aspelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:16
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; F04B1/00; F04B1/12; F04B1/122; F04B1/124; F04B1/20; F04B1/2014; F04B1/2064; F04B1/22; F04B1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1986584A
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US1996889A
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US2073710A
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US2364301A
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US2420622A
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US2437791A
Cited
US2459786A
Cited
US2608158A
Cited
US2505191A
Cited
US2779296A
Cited
US2746392A
Cited
US2768582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |