US2697614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tandem trailer device
Assignee: Individual
•
Filing: 1951-04-02
•
Granted: 1954-12-21
•
Expires: 1971-04-02
Abstract
No abstract record available.
Inventors
- 👤 Otho W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:34
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0871
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US869583A
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US1804089A
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US2126819A
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US2161219A
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US2167125A
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US2330897A
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US2351151A
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US2445134A
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US2517940A
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US2495943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |