Patent US2441293A successfully refreshed from Google Patents.
US2441293A
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US
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Tractor-semitrailer coupling
Assignee: Individual
•
Filing: 1946-11-22
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Granted: 1948-05-11
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Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 Carl G Seyferth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:16
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08
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) | 1951-05-11 | 1951-11-10 | 1952-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-11 | 1955-11-10 | 1956-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-11 | 1959-11-10 | 1960-05-11 | $7700.00 | Window Closed / Lapsed |