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US2909684A
Expired / Lapsed
US
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Infinitely adjustable speed power drive units
Assignee: George Gorton Machine Co
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Filing: 1957-01-07
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Granted: 1959-10-20
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Expires: 1977-01-07
Abstract
No abstract record available.
Inventors
- 👤 Donovan F Peterson
- 👤 Alvin C Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:09
CPC Classifications
H; H02; H02P; H02P29/00; H02P29/0016; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/304536
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) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |