US2604798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission unit with feedback to vary the gear ratio
Assignee: Individual
•
Filing: 1949-07-28
•
Granted: 1952-07-29
•
Expires: 1969-07-28
Abstract
No abstract record available.
Inventors
- 👤 Alrena L Welsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:09
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/62; F16H3/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US986588A
Cited
US1264561A
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US1204379A
Cited
FR614340A
Cited
FR856446A
Cited
US2292079A
Cited
US2364448A
Cited
FR905503A
Cited
US2472559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |