Patent US2729309A successfully refreshed from Google Patents.
US2729309A
Expired / Lapsed
US
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Combined trailer hitch and hydraulic brake operating mechanism
Assignee: Individual
•
Filing: 1953-07-13
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Granted: 1956-01-03
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Expires: 1973-07-13
Abstract
No abstract record available.
Inventors
- 👤 Robert K Mullin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:32
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/108; B60T11/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2341965A
Cited
US2522855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |