Patent US2630231A successfully refreshed from Google Patents.
US2630231A
Expired / Lapsed
US
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Tractor attachment
Assignee: Individual
•
Filing: 1950-12-26
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Granted: 1953-03-03
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Expires: 1970-12-26
Abstract
No abstract record available.
Inventors
- 👤 Hans C Klinge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:52
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; B; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66C23/44; E02F3/28; E02F3/36; E02F3/369; E02F3/627; E02F3/6273
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2281928A
Cited
US2322432A
Cited
US2387656A
Cited
US2455474A
Cited
US2495143A
Cited
US2526500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |