US3540198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swing knife assembly for a rotary mower
Assignee: Jacobsen Manufacturing Co
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Filing: 1967-09-14
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Granted: 1970-11-17
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Expires: 1987-09-14
Abstract
No abstract record available.
Inventors
- 👤 Sherman C Heth
- 👤 Vernon R Kaufman
- 👤 Donald G Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:35
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/404; A01D34/412; A01D34/63; A01D34/73; A01D34/736
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) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |