Patent US3487900A successfully refreshed from Google Patents.
US3487900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller clutch
Assignee: AT&T Teletype Corp
•
Filing: 1967-12-13
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Granted: 1970-01-06
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Expires: 1987-12-13
Abstract
No abstract record available.
Inventors
- 👤 David A Dahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:27
CPC Classifications
F; F16; F16D; F16D41/00; F16D41/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE1072890B
Cited
US1803077A
Cited
US1721504A
Cited
US1674226A
Cited
US1967322A
Cited
US2140737A
Cited
US2644560A
Cited
US2985271A
Cited
US3034621A
Cited
US3062346A
Cited
US3244263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |