Patent US3501998A successfully refreshed from Google Patents.
US3501998A
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US
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Open chamber breech mechanism with explosion actuated cylinder
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1967-08-31
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Granted: 1970-03-24
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Expires: 1987-08-31
Abstract
No abstract record available.
Inventors
- 👤 David Dardick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:18
CPC Classifications
F; F41; F41A; F41A9/00; F41A9/49; F41A9/01; F41A9/24; F41A9/26; F41A9/27; F41A9/38; F41A9/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US584631A
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US688217A
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US2804810A
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US2965001A
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US2865126A
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US2876680A
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US2831401A
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US2976770A
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US2977856A
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US2978962A
Cited
US3030723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |