US3149474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for water boiler
Assignee: RTX Corp
•
Filing: 1963-05-16
•
Granted: 1964-09-22
•
Expires: 1983-05-16
Abstract
No abstract record available.
Inventors
- 👤 Robert B Goodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:22
CPC Classifications
F; F22; F22B; F22B35/00; F22B35/007; F22B3/00; F22B3/04; F22B3/045; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7759; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7789
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A DEVICE FOR LIMITING TO SUBSTANTIALLY THE OPTIMUM EFFICIENCY POINT OF THE OPERATION OF AN EJECTOR ADAPTED TO LOWER THE AMBIENT PRESSURE IN A WATER BOILER, THROTTLING MEANS FOR REGULATING THE FLOW OF FLUID THROUGH SAID EJECTOR, CONTROL MEANS RESPONSIVE TO THE FLUID DISCHARGING FROM THE WATER BOILER FOR CONTROLLING SAID THROTTLING MEANS, MEANS RESPONSIVE TO THE PRESSURE RATIO ACROSS SAID EJECTOR OVERRIDING SAID CONTROL MEANS FOR FURTHER CONTROLLING SAID THROTTING MEANS.
Claim 2
Independent Claim
72 words
A DEVICE FOR LIMITING TO SUBSTANTIALLY THE OPTIMUM EFFICIENCY POINT OF THE OPERATION OF AN EJECTOR ADAPTED TO LOWER THE AMBIENT PRESSURE IN A WATER BOILER, THROTTLING MEANS FOR REGULATING THE FLOW OF FLUID THROUGH SAID EJECTOR, CONTROL MEANS RESPONSIVE TO THE FLUID DISCHARGING FROM THE WATER BOILER FOR CONTROLLING SAID THROTTLING MEANS, MEANS RESPONSIVE TO THE PRESSURE RATIO ACROSS SAID EJECTOR OVERRIDING SAID CONTROL MEANS FOR FURTHER CONTROLLING SAID THROTTING MEANS.
References Cited (Backward Citations)
US2252368A
Cited
US1407993A
Cited
US2227168A
Cited
US2052305A
Cited
US2207921A
Cited
US2140306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |