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Patent US2587721A successfully refreshed from Google Patents.
US2587721A
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Vineyard cultivator
Assignee: Individual
•
Filing: 1947-05-24
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Granted: 1952-03-04
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Expires: 1967-05-24
Abstract
No abstract record available.
Inventors
- 👤 Garnsey Hamilton
- 👤 John J Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:11
CPC Classifications
A; A01; A01B; A01B39/00; A01B39/12; A01B39/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US655375A
Cited
US888635A
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US1078514A
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US1361638A
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US1873749A
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US2419331A
Cited
US2433422A
Cited
US2442198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |