US2528897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cotton chopper and beet topping device
Assignee: Individual
•
Filing: 1947-01-10
•
Granted: 1950-11-07
•
Expires: 1967-01-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Mayfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:49
CPC Classifications
A; A01; A01B; A01B41/00; A01B41/04; A01D; A01D23/00; A01D23/02; A01D2023/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US200114A
Cited
US361698A
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US369163A
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US382435A
Cited
US1113940A
Cited
US1625087A
Cited
US1550342A
Cited
US1622865A
Cited
US2008742A
Cited
US2244774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |