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US3052307A
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Cultivator apparatus for sub-soil operation
Assignee: Individual
•
Filing: 1959-10-19
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Granted: 1962-09-04
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Expires: 1979-10-19
Abstract
No abstract record available.
Inventors
- 👤 John D Kirschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:38
CPC Classifications
A; A01; A01B; A01B35/00; A01B35/02; A01B35/04; A01B35/08; Y; Y10; Y10T; Y10T403/00; Y10T403/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1246851A
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US2575428A
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US2493023A
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US2619890A
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US2764421A
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US2752837A
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US2960170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |