Patent US3242496A successfully refreshed from Google Patents.
Patent US2657489A successfully refreshed from Google Patents.
US2657489A
Expired / Lapsed
US
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Magazine floor plate release mechanism
Assignee: Individual
•
Filing: 1950-04-03
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Granted: 1953-11-03
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Expires: 1970-04-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Leonard Franklin Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:21
CPC Classifications
F; F41; F41A; F41A9/00; F41A9/61; F41A9/64; F41A9/65
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US667856A
Cited
GB191128493A
Cited
US1056057A
Cited
US1132044A
Cited
US1172069A
Cited
US1410354A
Cited
US1552457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |