US3393697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve seat
Assignee: Henry Pratt Co LLC
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Filing: 1958-03-10
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Granted: 1968-07-23
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Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 Donald G Fawkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:52
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2263; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6031; Y10T137/6048; Y10T137/6052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A VALVE SEAT FOR A BUTTERFLY VALVE HAVING A VALVE BODY CARRYING A VALVE DISC, COMPRISING: A VALVE SEAT OF RESILIENT MATERIAL IN THE INTERIOR OF SAID VALVE BODY AND HAVING AN INNER SURFACE, SAID VALVE SEAT HAVING A WIDTH GENERALLY OF THE ORDER OF ITS RADIAL THICKNESS, SAID BODY HAVING AN ANNULAR GROOVE IN ITS INTERIOR SURFACE RECEIVING SAID VALVE SEAT WITH THE RESILIENT MATERIAL EXTENDING RADIALLY INWARDLY BEYOND THE VALVE BODY, SAID BODY GROOVE INCLUDING OPPOSITE SIDE WALLS AND HAVING A WIDTH IN EXCESS OF THE WIDTH OF THE VALVE SEAT MATERIAL; VALVE
Claim 2
Dependent Claim
95 words
A VALVE SEAT FOR A BUTTERFLY VALVE HAVING A VALVE BODY CARRYING A VALVE DISC, COMPRISING: A VALVE SEAT OF RESILIENT MATERIAL IN THE INTERIOR OF SAID VALVE BODY AND HAVING AN INNER SURFACE, SAID VALVE SEAT HAVING A WIDTH GENERALLY OF THE ORDER OF ITS RADIAL THICKNESS, SAID BODY HAVING AN ANNULAR GROOVE IN ITS INTERIOR SURFACE RECEIVING SAID VALVE SEAT WITH THE RESILIENT MATERIAL EXTENDING RADIALLY INWARDLY BEYOND THE VALVE BODY, SAID BODY GROOVE INCLUDING OPPOSITE SIDE WALLS AND HAVING A WIDTH IN EXCESS OF THE WIDTH OF THE VALVE SEAT MATERIAL; VALVE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |