Patent US2629441A successfully refreshed from Google Patents.
US2629441A
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Means for engaging and disengaging rotary cutters
Assignee: Armstrong World Industries Inc
•
Filing: 1948-05-25
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Granted: 1953-02-24
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Expires: 1968-05-25
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Eager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:20
CPC Classifications
D; D06; D06H; D06H7/00; D06H7/04; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19502; Y10T74/19516; Y10T83/00; Y10T83/626; Y10T83/637; Y10T83/768; Y10T83/7751; Y10T83/7809; Y10T83/7822; Y10T83/783; Y10T83/7834
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) | 1956-02-24 | 1956-08-25 | 1957-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-24 | 1960-08-25 | 1961-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-24 | 1964-08-25 | 1965-02-24 | $7700.00 | Window Closed / Lapsed |