Patent US3521653A successfully refreshed from Google Patents.
US3521653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission
Assignee: Unisys Corp
•
Filing: 1967-12-13
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Granted: 1970-07-28
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Expires: 1987-12-13
Abstract
No abstract record available.
Inventors
- 👤 Kenneth F Becker
- 👤 Le Roy D Taylor
- 👤 Walter J Zoya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:13
CPC Classifications
F; F15; F15C; F15C3/00; F15C3/06; F15C1/00; F15C1/02; F15C1/04; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/218; Y10T137/2202; Y10T137/2213; Y10T137/2218; Y10T137/8593; Y10T137/877
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3124999A
Cited
US3168898A
Cited
US3181546A
Cited
US3282282A
Cited
US3410291A
Cited
US3342392A
Cited
US3396631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |