US2609741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cultivator attachment for tractors
Assignee: Individual
•
Filing: 1948-08-30
•
Granted: 1952-09-09
•
Expires: 1968-08-30
Abstract
No abstract record available.
Inventors
- 👤 Evenson Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:03
CPC Classifications
A; A01; A01B; A01B35/00; A01B35/02; A01B35/10; A01B35/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1620099A
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US1964559A
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US2090980A
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US2099637A
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US2131872A
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US2152212A
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US2228490A
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US2404518A
Cited
US2386025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |