Patent US3428335A successfully refreshed from Google Patents.
US3428335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift hitch assembly
Assignee: Individual
•
Filing: 1967-03-08
•
Granted: 1969-02-18
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Expires: 1987-03-08
Abstract
No abstract record available.
Inventors
- 👤 David A Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:38
CPC Classifications
A; A01; A01B; A01B49/00; A01B59/00; A01B59/04; A01B59/042; A01B59/043; Y; Y10; Y10S; Y10S111/00; Y10S111/925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2445145A
Cited
US2842899A
Cited
US2691932A
Cited
US2842077A
Cited
US3048228A
Cited
US3078930A
Cited
US3065977A
Cited
US3172686A
Cited
DE1198602B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |