Patent US3413864A successfully refreshed from Google Patents.
US3413864A
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Variable-ratio frictional drives
Assignee: English Electric Co Ltd
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Filing: 1967-03-09
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Granted: 1968-12-03
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Expires: 1987-03-09
Abstract
No abstract record available.
Inventors
- 👤 Magill George Maurice Martin
- 👤 Schofield Clifford Raymond
- 👤 Rhodes Richard Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:50
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/66; F16H61/664; F16H13/00; F16H13/10; F16H15/00; F16H15/02; F16H15/04; F16H15/06; F16H15/32; F16H15/36; F16H15/38; F16H61/6646; F16H2015/383
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3276279A
Cited
US3277745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |