US2821273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure brake system
Assignee: ERLING D SEDERGREN
•
Filing: 1954-12-14
•
Granted: 1958-01-28
•
Expires: 1974-12-14
Abstract
No abstract record available.
Inventors
- 👤 Roy S Sanford
- 👤 James O Eames
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:05
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/78; B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/16; B60T13/18; F16D55/00; F16D55/02; F16D55/22; F16D55/228; F16D55/24; F16D55/26; F16D65/84; F16D65/853; F16D65/02; F16D2065/024; F16D2065/782; F16D2065/783; F16D2065/784
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US464949A
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US1482661A
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US1855636A
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US2111335A
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US2051286A
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US2152489A
Cited
GB477510A
Cited
US2358740A
Cited
US2406304A
Cited
US2621769A
Cited
GB653565A
Cited
US2664176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |