US3144876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swing-type check valve
Assignee: Halliburton Co
•
Filing: 1962-04-25
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Granted: 1964-08-18
•
Expires: 1982-04-25
Abstract
No abstract record available.
Inventors
- 👤 James A Frye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:08
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; F16K27/00; F16K27/02; F16K27/0209; F16K27/0227; F16K27/0232; F16K15/033; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7613; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7901; Y10T137/7902; Y10T137/7903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A SWING-TYPE CHECK VALVE, COMPRISING: A TUBULAR VALVE BODY STRUCTURE DEFINING A THROAT HAVING A VALVE SEAT AT ITS UPSTREAM END AND AN ENLARGED VALVE CHAMBER BEYOND THE UPSTREAM END OF SAID THROAT, WHEREBY FLUID FLOWING THROUGH SAID THROAT TENDS TO FORM A JET STREAM IN THE CENTER OF SAID VALVE CHAMBER AND AN ANNULAR REGION OF LOWER VELOCITY FLUID AROUND SAID JET STREAM; A VALVE MEMBER FOR SAID VALVE SEAT IN SAID VALVE CHAMBER, HINGE MEANS FOR SAID VALVE MEMBER HAVING A PIVOTAL AXIS IN SAID ANNU-
Claim 2
Dependent Claim
88 words
A SWING-TYPE CHECK VALVE, COMPRISING: A TUBULAR VALVE BODY STRUCTURE DEFINING A THROAT HAVING A VALVE SEAT AT ITS UPSTREAM END AND AN ENLARGED VALVE CHAMBER BEYOND THE UPSTREAM END OF SAID THROAT, WHEREBY FLUID FLOWING THROUGH SAID THROAT TENDS TO FORM A JET STREAM IN THE CENTER OF SAID VALVE CHAMBER AND AN ANNULAR REGION OF LOWER VELOCITY FLUID AROUND SAID JET STREAM; A VALVE MEMBER FOR SAID VALVE SEAT IN SAID VALVE CHAMBER, HINGE MEANS FOR SAID VALVE MEMBER HAVING A PIVOTAL AXIS IN SAID ANNU-
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |