Patent US2661940A successfully refreshed from Google Patents.
US2661940A
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US
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Cutter chain
Assignee: Joy Manufacturing Co
•
Filing: 1948-05-26
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Granted: 1953-12-08
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Expires: 1968-05-26
Abstract
No abstract record available.
Inventors
- 👤 Lester G Rollins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:34
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/22; E21C25/28; Y; Y10; Y10T; Y10T83/00; Y10T83/707; Y10T83/7264; Y10T83/929; Y10T83/9319; Y10T83/9346; Y10T83/9367
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |