US2120443A
Expired / Lapsed
US
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Method and apparatus for braking
Assignee: CINCINNATI TRACTION BUILDING C
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Filing: 1937-06-08
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Granted: 1938-06-14
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Expires: 1957-06-08
Abstract
No abstract record available.
Inventors
- 👤 Theodore H Schoepf
- 👤 David M Ritchie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:55
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/321; B60T8/3235; B60T8/324; Y; Y10; Y10S; Y10S200/00; Y10S200/09; Y10T; Y10T137/00; Y10T137/0971; Y10T137/1007; Y10T137/108; Y10T137/2496; Y10T137/2544
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-06-13 | 1941-12-13 | 1942-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-13 | 1945-12-13 | 1946-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-13 | 1949-12-13 | 1950-06-14 | $7700.00 | Window Closed / Lapsed |