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US2444181A
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US
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Master cylinder
Assignee: Individual
•
Filing: 1942-02-10
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Granted: 1948-06-29
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Expires: 1962-02-10
Abstract
No abstract record available.
Inventors
- 👤 Baldwin Philip Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:26
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D65/22; B; B60; B60T; B60T11/00; B60T11/10; B60T11/16; B60T11/236; F16J; F16J15/00; F16J15/16; F16J15/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2060847A
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US2196995A
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US2185991A
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US2276009A
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US2180795A
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US2175431A
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US2258257A
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US2157039A
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US2232349A
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US2227838A
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US2326116A
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US2352920A
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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) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |