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US2509940A
Expired / Lapsed
US
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Variable speed changing gear
Assignee: Individual
•
Filing: 1946-12-04
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Granted: 1950-05-30
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Expires: 1966-12-04
Abstract
No abstract record available.
Inventors
- 👤 Rennerfelt Sven Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:43
CPC Classifications
F; F16; F16H; F16H15/00; F16H15/02; F16H15/04; F16H15/06; F16H15/08; F16H15/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US768574A
Cited
US766438A
Cited
US1336927A
Cited
GB204861A
Cited
FR558480A
Cited
GB392917A
Cited
US1973064A
Cited
US2259881A
Cited
US2342946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |