Patent US2581941A successfully refreshed from Google Patents.
US2581941A
Expired / Lapsed
US
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Brake with lubricated disks
Assignee: Bridgestone Firestone Inc
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Filing: 1946-07-24
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Granted: 1952-01-08
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Expires: 1966-07-24
Abstract
No abstract record available.
Inventors
- 👤 Byron H Shinn
- 👤 John E Ullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:37
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/24; F16D55/26; F16D55/28; F16D55/32; F16D2055/0004; F16D2055/005; F16D2055/0058
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1906711A
Cited
US2014630A
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US1989211A
Cited
US2109110A
Cited
US2149483A
Cited
US2255024A
Cited
US2389061A
Cited
US2381941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |