Patent US3140728A successfully refreshed from Google Patents.
US3140728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure four-way valve
Assignee: Individual
•
Filing: 1961-04-20
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Granted: 1964-07-14
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Expires: 1981-04-20
Abstract
No abstract record available.
Inventors
- 👤 James E Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:45
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/0712; Y; Y10; Y10S; Y10S251/00; Y10S251/90; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A VALVE STRUCTURE, COMPRISING: A VALVE BODY HAVING A BORE THEREIN, AND AN INLET PORT IN THE FORM OF AN ANNULAR CHANNEL; A VALVE ARMATURE SLIDABLE IN SAID VALVE BODY, SAID ARMATURE DEFINING AN ANNULAR O-RING GROOVE AND HAVING FLANKING LANDS SLIDABLY FITTING SAID BORE, SAID LANDS HAVING AXIAL DIMENSIONS GREATER THAN SAID INLET PORT; AND AN O-RING IN SAID GROOVE ADAPTED TO PASS ACROSS SAID INLET PORT WHILE SAID LANDS RESTRICT FLOW THERETHROUGH.
Claim 2
Dependent Claim
74 words
A VALVE STRUCTURE, COMPRISING: A VALVE BODY HAVING A BORE THEREIN, AND AN INLET PORT IN THE FORM OF AN ANNULAR CHANNEL; A VALVE ARMATURE SLIDABLE IN SAID VALVE BODY, SAID ARMATURE DEFINING AN ANNULAR O-RING GROOVE AND HAVING FLANKING LANDS SLIDABLY FITTING SAID BORE, SAID LANDS HAVING AXIAL DIMENSIONS GREATER THAN SAID INLET PORT; AND AN O-RING IN SAID GROOVE ADAPTED TO PASS ACROSS SAID INLET PORT WHILE SAID LANDS RESTRICT FLOW THERETHROUGH.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |