US2823776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple magnetic friction device
Assignee: Dana Inc
•
Filing: 1953-07-16
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Granted: 1958-02-18
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Expires: 1973-07-16
Abstract
No abstract record available.
Inventors
- 👤 William C Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:52
CPC Classifications
F; F16; F16D; F16D67/00; F16D67/02; F16D67/06; F16D27/00; F16D27/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2348967A
Cited
US2646145A
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US2614668A
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US2544360A
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US2612248A
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US2738449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |