US3347516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapered plug valve
Assignee: Waldorf Paper Products Co
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Filing: 1965-02-04
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Granted: 1967-10-17
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Expires: 1985-02-04
Abstract
No abstract record available.
Inventors
- 👤 Rienard W Linde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:00
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/08; F16K11/083; F16K11/0833; F16K5/00; F16K5/02; F16K5/0207; F16K5/0214
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
147 words
A TAPERED PLUG VALVE COMPRISING: A VALVE HOUSING INCLUDING INLET AND OUTLET PORTS, A VALVE SEAT TAPERED AT AN OBLIQUE ANGLE TO THE AXIS OF ROTATION OF A TAPERED ARCUATE FRUSTO-CONCIAL GATE, AN OPENING ADAPTED TO RECEIVE A VALVE GATE ASSEMBLY AND A TOP FLANGE ADAPTED TO RECEIVE A BONNET; A ROTATABLE VALVE GATE ASSEMBLY INCLUDING A TAPERED ARCUATE FRUSTO-CONICAL GATE OF A WIDTH TO CLOSE A SINGLE SELECTED PORT RECEIVED IN SAID VALVE HOUSING TO PROVIDE SURFACES ADAPTED TO BE IN CONTACT, A TOP GUIDE MOUNTED ON THE TAPERED ARCUATE FRUSTO-CONCIAL GATE AND EXTENDING THEREFROM SO THAT THE GUIDE MAY REST ON THE TAPERED VALVE SEAT, A BOTTOM GUIDE GENERALLY PARELLEL TO SAID TOP GUIDE SAND NORMAL TO THE AXIS OF THE GATE MOUNTED ON A TAPERED ARCUATE FRUSTO-CONICAL GATE AND EXTENDING THEREFROM SO THAT THE GUIDE MAY REST ON THE TAPERED VALVE SEAT, A 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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |