US3390727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring tooth harrow
Assignee: HARRISON WEAVER JR
•
Filing: 1967-04-20
•
Granted: 1968-07-02
•
Expires: 1987-04-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Harrison Weaver
- 👤 John W Haun
- 👤 Thomas C Hoyt
- 👤 Clarence M Hansen
- 👤 William H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:54
CPC Classifications
A; A01; A01B; A01B73/00; A01B73/02; A01B73/04; A01B73/044; A01B19/00; A01B19/10; A01B23/00; A01B23/02; A01B23/04; A01B23/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2712718A
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US2637564A
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US2679793A
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US2754739A
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US3008527A
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FR1274266A
Cited
US3152431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |