US2770139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetically sealed torque transmission system
Assignee: Individual
•
Filing: 1952-11-26
•
Granted: 1956-11-13
•
Expires: 1972-11-26
Abstract
No abstract record available.
Inventors
- 👤 Yuin C Shen
- 👤 Harlow D Adkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:37
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/50; F16J15/52; F16J15/525
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1301948A
Cited
US1378118A
Cited
US1731009A
Cited
US1789700A
Cited
US2449772A
Cited
US2551847A
Cited
US2659569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |