US2645989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cultivator attachment for tractors
Assignee: RODGER F BECKER
•
Filing: 1950-03-20
•
Granted: 1953-07-21
•
Expires: 1970-03-20
Abstract
No abstract record available.
Inventors
- 👤 Prince Gerrit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:52
CPC Classifications
A; A01; A01B; A01B35/00; A01B35/02; A01B35/10; A01B35/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US411470A
Cited
US438153A
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US1316325A
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US1906430A
Cited
US2140712A
Cited
GB549114A
Cited
US2363749A
Cited
US2562486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |