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US2959231A
Expired / Lapsed
US
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In row-straddle row cultivator
Assignee: Individual
•
Filing: 1957-05-22
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Granted: 1960-11-08
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Expires: 1977-05-22
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Heilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:43
CPC Classifications
A; A01; A01B; A01B39/00; A01B39/08; A01B39/085; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19112; Y10T74/19116
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1495113A
Cited
US1664789A
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US2176261A
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US2250391A
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US2689510A
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US2847924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |