US2790518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodynamic brake with rotor pumps
Assignee: United States Spring & Bumper Co
•
Filing: 1951-11-03
•
Granted: 1957-04-30
•
Expires: 1971-11-03
Abstract
No abstract record available.
Inventors
- 👤 Eldon M Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:24
CPC Classifications
F; F16; F16D; F16D57/00; F16D57/005; F16D33/00; F16D57/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1228215A
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US1915547A
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US1992910A
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US2113109A
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US2428005A
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US2341122A
Cited
US2425171A
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US2672953A
Cited
US2496497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |