US3199833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing washer energized by an annular spring element
Assignee: Skinner Products Inc
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Filing: 1964-07-22
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Granted: 1965-08-10
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Expires: 1984-07-22
Abstract
No abstract record available.
Inventors
- 👤 Sr Ralph L Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:44
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
A SEALING WASHER FOR USE IN A VALVE OF THE TYPE HAVING A BODY PROVIDED WITH A FLUID PASSAGE HAVING AN OPENING AND A VALVE SEAT AROUND SAID OPENING, AND A VALVE STEM MOUNTED IN SAID BODY FOR MOVEMENT ALONG THE AXIS OF SAID OPENING AND RELATIVE TO SAID SEAT, SAID WASHER BEING OF NORMALLY INERT POLYETERAFLUOROETHYLENE RESIN MATERIAL AND ADAPTED TO BE MOUNTED ON THE INNER END OF SAID VALVE STEM TO MOVE THEREWITH AGAINST AND FROM SAID VALVE TO CONTROL FLUID FLOW THROUGH SAID PASSAGE, SAID SEALING WASHER HAVING A FORWARDLY AND OUTWARDLY TAPERED REAR FACE,
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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |