Patent US3470987A successfully refreshed from Google Patents.
US3470987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically released friction brake
Assignee: Dana Inc
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Filing: 1967-12-26
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Granted: 1969-10-07
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Expires: 1987-12-26
Abstract
No abstract record available.
Inventors
- 👤 Edward R Kroeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:42
CPC Classifications
F; F16; F16D; F16D59/00; F16D59/02; F16D55/00; F16D55/24; F16D55/26; F16D55/28; F16D2055/0004; F16D2055/0058; F16D2121/00; F16D2121/18; F16D2121/20; F16D2121/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |