Patent US2869400A successfully refreshed from Google Patents.
US2869400A
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Variable speed power transmission mechanism for use with hydraulic drives
Assignee: WESTERN GEAR WORKS
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Filing: 1954-05-24
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Granted: 1959-01-20
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Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Robert S Langdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:13
CPC Classifications
F; F16; F16H; F16H59/00; F16H59/02; F16H59/04; F16H59/045; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H3/663; F16H63/00; F16H63/02; F16H63/30; F16H63/3023; F16H63/3026; Y; Y10; Y10S; Y10S74/00; Y10S74/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |