Patent US2891371A successfully refreshed from Google Patents.
US2891371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lawn mower
Assignee: Individual
•
Filing: 1957-03-11
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Granted: 1959-06-23
•
Expires: 1977-03-11
Abstract
No abstract record available.
Inventors
- 👤 William A Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:12
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/42; A01D34/46; A01D2101/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US900443A
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US1095097A
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US1656517A
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US1779583A
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US1886408A
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US1992494A
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US2071872A
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US2313590A
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US2335054A
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US2538230A
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US2559920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-22 | 1962-12-22 | 1963-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-22 | 1966-12-22 | 1967-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-22 | 1970-12-22 | 1971-06-23 | $7700.00 | Window Closed / Lapsed |