Patent US2551136A successfully refreshed from Google Patents.
US2551136A
Expired / Lapsed
US
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Two-way hitch
Assignee: Individual
•
Filing: 1949-05-27
•
Granted: 1951-05-01
•
Expires: 1969-05-27
Abstract
No abstract record available.
Inventors
- 👤 Ray S Keltner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:22
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/01; B60D1/02; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32008; Y10T403/32114; Y10T403/32213; Y10T403/32606; Y10T403/32861; Y10T403/32877
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) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |