Patent US2021241A successfully refreshed from Google Patents.
US2021241A
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US
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Quick detachable coupling
Assignee: Individual
•
Filing: 1934-12-24
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Granted: 1935-11-19
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Expires: 1954-12-24
Abstract
No abstract record available.
Inventors
- 👤 Mall Arthur William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:10
CPC Classifications
F; F16; F16C; F16C1/00; F16C1/02; F16C1/08; F16B; F16B21/00; F16B21/10; F16B21/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-11-18 | 1939-05-20 | 1939-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-18 | 1943-05-20 | 1943-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-18 | 1947-05-20 | 1947-11-19 | $7700.00 | Window Closed / Lapsed |