US3420344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-stabilizing power transmitting device having hydraulically actuated friction plates and torque responsive hydraulic inverse feedback
Assignee: Twin Disc Inc
•
Filing: 1967-03-22
•
Granted: 1969-01-07
•
Expires: 1987-03-22
Abstract
No abstract record available.
Inventors
- 👤 Conrad R Hilpert
- 👤 James B Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:52
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/28; F16D43/286
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |