US2681713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary fluid brake
Assignee: Individual
•
Filing: 1951-09-07
•
Granted: 1954-06-22
•
Expires: 1971-09-07
Abstract
No abstract record available.
Inventors
- 👤 Robert B Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:07
CPC Classifications
F; F16; F16D; F16D57/00; F16D57/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7759; Y10T137/776
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US721303A
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US1156819A
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GB206493A
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US1501451A
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US1548460A
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US1559462A
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US1770796A
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US1992910A
Cited
US1979607A
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US2023533A
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US2208074A
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US2308753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |