Patent US3443454A successfully refreshed from Google Patents.
US3443454A
Expired / Lapsed
US
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Means for cooling torsional vibration damper
Assignee: Cummins Turbo Technologies Ltd
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Filing: 1967-03-28
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Granted: 1969-05-13
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Expires: 1987-03-28
Abstract
No abstract record available.
Inventors
- 👤 Jeffrey Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:01
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/30; F16F15/302; F16F15/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1939173A
Cited
US2594555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |