Patent US5889953A successfully refreshed from Google Patents.
US3391555A
Expired / Lapsed
US
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Locking device for a trailer hitch
Assignee: Individual
•
Filing: 1967-12-20
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Granted: 1968-07-09
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Expires: 1987-12-20
Abstract
No abstract record available.
Inventors
- 👤 Mamo Authony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:23
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/58; B60D1/60; B60D1/01; B60D1/06; B60D1/065; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5611; Y10T70/5854; Y10T70/5867; Y10T70/5889; Y10T70/5982; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7661
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |