Patent US2020667A successfully refreshed from Google Patents.
US2020667A
Expired / Lapsed
US
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Brake
Assignee: Wingfoot Corp
•
Filing: 1933-11-08
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Granted: 1935-11-12
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Expires: 1953-11-08
Abstract
No abstract record available.
Inventors
- 👤 James C Wahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:33
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/12; F16D55/00; F16D55/24; F16D55/26; F16D55/36; F16D55/40; F16D2055/0004; F16D2055/0058; F16D2065/13; F16D2065/1304; F16D2065/1316; F16D2065/134; F16D2065/1356; F16D2065/1368
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) | 1938-11-11 | 1939-05-13 | 1939-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-11 | 1943-05-13 | 1943-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-11 | 1947-05-13 | 1947-11-12 | $7700.00 | Window Closed / Lapsed |