Patent US2668460A successfully refreshed from Google Patents.
US2668460A
Expired / Lapsed
US
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Power transmission unit
Assignee: Old Carco LLC
•
Filing: 1951-03-02
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Granted: 1954-02-09
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Expires: 1971-03-02
Abstract
No abstract record available.
Inventors
- 👤 John P Butterfield
- 👤 Henry W Gilfillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:50
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/46; F16H3/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1293190A
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US1476458A
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GB136468A
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US1932983A
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GB433627A
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US2118464A
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US2236631A
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US2296520A
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US2317135A
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US2547038A
Cited
US2587015A
Cited
US2613773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |