Patent US2837887A successfully refreshed from Google Patents.
US2837887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary lawn mower blade
Assignee: Lord Manufacturing Co
•
Filing: 1957-05-03
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Granted: 1958-06-10
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Expires: 1977-05-03
Abstract
No abstract record available.
Inventors
- 👤 Henry W Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:40
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/73
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US898256A
Cited
US1441141A
Cited
US2427265A
Cited
US2492600A
Cited
US2608816A
Cited
US2740249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |