Patent AU31346A successfully refreshed from Google Patents.
US2650833A
Expired / Lapsed
US
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Coupling device for vehicles
Assignee: SPEARS WELLS MACHINERY Co
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Filing: 1952-06-26
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Granted: 1953-09-01
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Expires: 1972-06-26
Abstract
No abstract record available.
Inventors
- 👤 Ira M Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:55
CPC Classifications
B; B60; B60D; B60D1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE461675C
Cited
US1851349A
Cited
US1902212A
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US2117562A
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US2119263A
Cited
US2403820A
Cited
US2500064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |