US3443329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control and nudging means for earth working devices
Assignee: WE MARTIN Co
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Filing: 1965-09-08
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Granted: 1969-05-13
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Expires: 1985-09-08
Abstract
No abstract record available.
Inventors
- 👤 William E Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:02
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/6454; E02F3/6481; E02F3/65; E02F3/652
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |