Patent US2920436A successfully refreshed from Google Patents.
US2920436A
Expired / Lapsed
US
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Rotary safety blade
Assignee: TORO Manufacturing CORP
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Filing: 1956-05-31
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Granted: 1960-01-12
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Expires: 1976-05-31
Abstract
No abstract record available.
Inventors
- 👤 Donald O Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:00
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/73; A01D34/82; A01D34/826
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1336257A
Cited
US1656105A
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US1954579A
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US2071872A
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US2185659A
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US2602277A
Cited
US2737772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |