Patent US3520515A successfully refreshed from Google Patents.
US3520515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manually operated winch employing a toothed pulley
Assignee: Individual
•
Filing: 1967-12-11
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Granted: 1970-07-14
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Expires: 1987-12-11
Abstract
No abstract record available.
Inventors
- 👤 Jean Pomagalski
- 👤 Marcel Durand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:38
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/02; B66D1/04; B66D1/06; B66D5/00; B66D5/02; B66D5/12; B66D5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US676994A
Cited
US2165984A
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US2424910A
Cited
US2561139A
Cited
US2917278A
Cited
US3047114A
Cited
US3100031A
Cited
FR1411691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |