Patent US2641939A successfully refreshed from Google Patents.
US2641939A
Expired / Lapsed
US
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Tip up extension for air brake levers
Assignee: Individual
•
Filing: 1949-11-04
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Granted: 1953-06-16
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Expires: 1969-11-04
Abstract
No abstract record available.
Inventors
- 👤 Arnold W Mckee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:33
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/02; B60T7/08; B62; B62D; B62D1/00; B62D1/02; B62D1/16; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20256; Y10T74/20576; Y10T74/20732; Y10T74/20738
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |