Patent US2556512A successfully refreshed from Google Patents.
US2556512A
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US
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Variable ratio drive mechanism
Assignee: CUSHMAN MOTOR WORKS Inc
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Filing: 1949-03-08
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Granted: 1951-06-12
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Expires: 1969-03-08
Abstract
No abstract record available.
Inventors
- 👤 Charles D Ammon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:31
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/52; F16H55/56; F16H55/563; F16H61/00; F16H61/66; F16H61/662; F16H61/66231; F16H61/66245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1501705A
Cited
GB435257A
Cited
US2294777A
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US2378549A
Cited
US2497544A
Cited
US2496201A
Cited
US2496061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |