Patent US1980958A successfully refreshed from Google Patents.
US3104745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-torque spring slip clutch
Assignee: International Business Machines Corp
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Filing: 1961-07-10
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Granted: 1963-09-24
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Expires: 1981-07-10
Abstract
No abstract record available.
Inventors
- 👤 Walter J Wipke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:23
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/10; F16D27/105; F16D7/00; F16D7/02; F16D7/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1629420A
Cited
US2134202A
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US2242379A
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US2475432A
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US2968380A
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US2930463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |