Patent US2597615A successfully refreshed from Google Patents.
US2597615A
Expired / Lapsed
US
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Tractor attachment
Assignee: Individual
•
Filing: 1947-06-13
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Granted: 1952-05-20
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Expires: 1967-06-13
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:35
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/34; B65H75/38; B65H75/40; B65H75/42; B65H75/425; B66; B66D; B66D1/00; B66D2700/00; B66D2700/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1566740A
Cited
US1807582A
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US1469818A
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US1748601A
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US1809266A
Cited
US1814912A
Cited
US2078489A
Cited
US2130504A
Cited
US2367912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |