Patent US3588809A successfully refreshed from Google Patents.
US3588809A
Expired / Lapsed
US
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Trailer warning device
Assignee: Individual
•
Filing: 1968-01-16
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Granted: 1971-06-28
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Expires: 1988-01-16
Abstract
Abstract A WARNING DEVICE IS PROVIDED FOR USE WITH A CONVENTIONAL TRAILER HITCH. IT INCLUDES A PLATE SECURABLE TO THE TRAILER HITCH AND A PAIR OF ARMS ADJUSTABLE WITHIN ARCUATE SLOTS IN THE PLATE. THE ENDS OF THE ARMS ARE PROVIDED WITH SIGNAL ACTUATING DEVICES. THE SIGNAL IS ACTUATED BY CONTACT WITH THE TRAILER HITCH DRAWBAR TO WARN THE VEHICLE OPERATOR THAT THE TRAILER AND VEHICLE ARE DANGEROUSLY CLOSE TO EACH OTHER.
Inventors
- 👤 Archibald S Devlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:09
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/24; B60D1/36
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |