Patent US2704491A successfully refreshed from Google Patents.
US2704491A
Expired / Lapsed
US
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Lxxk r released by inertia member
Assignee: —
•
Filing: —
•
Granted: 1955-03-22
•
Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:42
CPC Classifications
F; F41; F41A; F41A3/00; F41A3/12; F41A3/36; F41A3/38; F41A3/40; F41A3/64; F41A3/78; F41A3/82; F41A3/84; F41A35/00; F41A35/02; F41A5/00; F41A5/02; F41A5/10; F41A5/12; F41A9/00; F41A9/01; F41A9/06; F41A9/09; F41A9/10; F41A9/13; F41A9/16; F41A9/17; F41A9/18; F41A9/61; F41A9/64; F41A9/72; F41C; F41C7/00; F41C7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1147780A
Cited
GB540879A
Cited
US2333677A
Cited
US2418946A
Cited
US2480074A
Cited
US2466902A
Cited
US2506982A
Cited
US2626475A
Cited
US2634536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-21 | 1958-09-20 | 1959-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-21 | 1962-09-20 | 1963-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-21 | 1966-09-20 | 1967-03-22 | $7700.00 | Window Closed / Lapsed |