US3464432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for stabilizing speed control action on hydraulic turbines
Assignee: United States Department of the Interior
•
Filing: 1967-05-08
•
Granted: 1969-09-02
•
Expires: 1987-05-08
Abstract
No abstract record available.
Inventors
- 👤 Ferber R Schleif
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:43
CPC Classifications
F; F03; F03B; F03B15/00; F03B15/02; F03B15/04; F03B15/06; F03B15/08; F03B15/10; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/0989
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3187223A
Cited
US3291146A
Cited
US3274443A
Cited
US3288160A
Cited
US3348559A
Cited
US3340883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |