Patent US3097489A successfully refreshed from Google Patents.
US3097489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed
Assignee: —
•
Filing: —
•
Granted: 1963-07-16
•
Expires: 1980-07-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:57
CPC Classifications
F; F01; F01K; F01K7/00; F01K7/16; F01K7/22; F01K7/24; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN AN ELECTRO-HYDRAULIC TURBINE CONTROL SYSTEM OF THE TYPE HAVING A PLURALITY OF STEAM VALVES CONTROLLING THE FLOW OF STREAM TO A TURBINE AND POSITIONED IN ACCORDANCE WITH ELECTRICAL SIGNALS REPRESENTATIVE OF THE ERROR BETWEEN DESIRED TURBINE SPEED AND ACTUAL TURBINE SPEED AT A GIVEN LOAD, THE COMBINATION OF: STOP VALVE MEANS POSITIONED BY A FIRST ELECTRICAL SIGNAL DERIVED FROM A SPEED ERROR INDICATION, A PLURALITY OF CONTROL VALVE MEANS SUPPLIED WITH STEAM THROUGH SAID STOP VALVE MEANS, ANS SEQUENTIALLY POSITIONED BY A SECOND ELECTRICAL SIGNAL DERIVED FROM THE SAME SPEED ERROR INDICATION,
Claim 2
Dependent Claim
93 words
IN AN ELECTRO-HYDRAULIC TURBINE CONTROL SYSTEM OF THE TYPE HAVING A PLURALITY OF STEAM VALVES CONTROLLING THE FLOW OF STREAM TO A TURBINE AND POSITIONED IN ACCORDANCE WITH ELECTRICAL SIGNALS REPRESENTATIVE OF THE ERROR BETWEEN DESIRED TURBINE SPEED AND ACTUAL TURBINE SPEED AT A GIVEN LOAD, THE COMBINATION OF: STOP VALVE MEANS POSITIONED BY A FIRST ELECTRICAL SIGNAL DERIVED FROM A SPEED ERROR INDICATION, A PLURALITY OF CONTROL VALVE MEANS SUPPLIED WITH STEAM THROUGH SAID STOP VALVE MEANS, ANS SEQUENTIALLY POSITIONED BY A SECOND ELECTRICAL SIGNAL DERIVED FROM THE SAME SPEED ERROR INDICATION,
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |