US3450212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple tooth subsoil plow
Assignee: Individual
•
Filing: 1967-10-18
•
Granted: 1969-06-17
•
Expires: 1987-10-18
Abstract
No abstract record available.
Inventors
- 👤 Alfred Glenn Sylvester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:25
CPC Classifications
A; A01; A01B; A01B15/00; A01B15/02; A01B15/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US106837A
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US828615A
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US939761A
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US1202569A
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US1531643A
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US2752837A
Cited
US2808772A
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US3039540A
Cited
US3052307A
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US3120281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |