Patent US2956643A successfully refreshed from Google Patents.
US2956643A
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US
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Automatic safety leg
Assignee: Individual
•
Filing: 1957-07-02
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Granted: 1960-10-18
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Expires: 1977-07-02
Abstract
No abstract record available.
Inventors
- 👤 John H Halstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:41
CPC Classifications
F; F16; F16P; F16P3/00; B; B66; B66F; B66F7/00; B66F7/10; B66F7/16; B66F7/18; F16B; F16B1/00; Y; Y10; Y10T; Y10T292/00; Y10T292/28; Y10T292/289; Y10T292/293
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US714177A
Cited
CH167086A
Cited
US2584124A
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US2566182A
Cited
US2608381A
Cited
US2684129A
Cited
US2718397A
Cited
US2906490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |