US3421389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed drive
Assignee: Richier SA
•
Filing: 1966-09-06
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Granted: 1969-01-14
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Expires: 1986-09-06
Abstract
No abstract record available.
Inventors
- 👤 Jean Fauchere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:58
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/02; F16H61/00; F16H61/38; F16H61/40; F16H61/44; F16H61/444; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19144
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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |