US2434546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-speed hydraulic drive
Assignee: J H WEATHERFORD
•
Filing: 1942-09-18
•
Granted: 1948-01-13
•
Expires: 1962-09-18
Abstract
No abstract record available.
Inventors
- 👤 Harry B Breedlove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:22
CPC Classifications
F; F16; F16H; F16H39/00; F16H39/04; F16H39/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US466662A
Cited
GB148876A
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DE361221C
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US1497741A
Cited
GB221749A
Cited
US1604321A
Cited
US1779757A
Cited
DE624254C
Cited
US2159941A
Cited
GB477028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-12 | 1951-07-14 | 1952-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-12 | 1955-07-14 | 1956-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-12 | 1959-07-14 | 1960-01-13 | $7700.00 | Window Closed / Lapsed |