Patent US2680349A successfully refreshed from Google Patents.
US2680349A
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US
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Leakage recovering mechanism for hydraulic brake booster mechanisms
Assignee: Automatic Shifters Inc
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Filing: 1948-02-26
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Granted: 1954-06-08
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Expires: 1968-02-26
Abstract
No abstract record available.
Inventors
- 👤 Hill Edward Govan
- 👤 Jeannot G Ingres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:13
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/241; B60T13/242; B60T13/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1617020A
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US1653276A
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US2140733A
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US1978667A
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US2222848A
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US2207226A
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US2328637A
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US2344768A
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US2438723A
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US2504691A
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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) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |