US3570226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically driven lawnmower
Assignee: Hanning Elektro Werke GmbH and Co KG
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Filing: 1968-08-05
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Granted: 1971-03-16
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Expires: 1988-08-05
Abstract
Abstract A LAWNMOWER IS DRIVEN BY AN ELECTRIC MOTOR. THE MOTOR IS PROVIDED WITH A BRAKE WHICH IS OPERATED MAGNETICALLY BY THE ROTOR OF THE MOTOR, AND WHICH IS APPLIED AUTOMATICALLY WHEN THE MOTOR IS DE-ENERGIZED.
Inventors
- 👤 Hans Haverkamp
- 👤 Gernot Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:14
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/67; A01D34/68; A01D34/6806; A01D34/6812; A01D2101/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |