Patent US2997897A successfully refreshed from Google Patents.
US2997897A
Expired / Lapsed
US
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Differential clutch mechanism
Assignee: Rockwell-Standard Corp
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Filing: 1958-05-06
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Granted: 1961-08-29
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Expires: 1978-05-06
Abstract
No abstract record available.
Inventors
- 👤 Nelson R Brownyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:37
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/048; F16H57/0482; F16H57/0483; F16H48/00; F16H48/06; F16H48/08; F16H48/20; F16H48/22; F16H48/38; F16H2048/382; F16H57/0434
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2733798A
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US1487073A
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US1622261A
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US1843987A
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US1979414A
Cited
US2578308A
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US2788877A
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US2778472A
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US2743792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |