Patent US2820400A successfully refreshed from Google Patents.
US2820400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cartridge link and feedwheel for a revolver-type gun
Assignee: Individual
•
Filing: 1954-02-03
•
Granted: 1958-01-21
•
Expires: 1974-02-03
Abstract
No abstract record available.
Inventors
- 👤 John F O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:12
CPC Classifications
F; F41; F41A; F41A9/00; F41A9/01; F41A9/24; F41A9/26; F41A9/27; F41A9/29; F41A9/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |