Patent US3492913A successfully refreshed from Google Patents.
US3492913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open chamber gun ammunition feed system
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1968-03-11
•
Granted: 1970-02-03
•
Expires: 1988-03-11
Abstract
No abstract record available.
Inventors
- 👤 Michael J Barnard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:17
CPC Classifications
F; F41; F41A; F41A9/00; F41A9/35; F41A9/36; F41A9/38; F41A9/46
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US323997A
Cited
US448841A
Cited
US479798A
Cited
GB490221A
Cited
US2849921A
Cited
US2831401A
Cited
US2996988A
Cited
US2959106A
Cited
US3041939A
Cited
US3140010A
Cited
US3328963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |