Patent US3241812A successfully refreshed from Google Patents.
US3241812A
Expired / Lapsed
US
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Valve assembly with covered valve head
Assignee: MAROTTA VALVE CORP
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Filing: 1964-12-02
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Granted: 1966-03-22
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Expires: 1984-12-02
Abstract
No abstract record available.
Inventors
- 👤 Donald A Worden
- 👤 Smolen Sam Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:45
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A VALVE ASSEMBLY INCLUDING A METAL VALVE ELEMENT HAVING A FRUSTO-CONICAL FRONT END, A PART OF WHICH COMPRISES A SEAT PORTION OF THE VALVE ELEMENT, AND ANNULAR GROOVE IN THE FRUSTO-CONICAL END RADIALLY INWARD FROM SAID SEAT PORTION, THE VALVE ELEMENT BEYOND THE FRUSTCONICAL END EXTENDING AXIALLY AND HAVING A REARWARDLY FACING ANNULAR SURFACE, A PLASTIC COATING OVER THE VALVE ELEMENT, SAID COATING BEING OF SOFTER MATERIAL THAN THE METAL OF THE VALVE ELEMENT AND HAVING A FORWARD END ANCHORED IN THE ANNULAR GROOVE OF THE FRUSTO-CONICAL END, THE COATING BEYOND SAID GROOVE EXTENDING ACROSS THE SEAT PORTION OF THE VALVE ELEMENT AND AXIALLY AND THEN RADIALLY
Claim 2
Dependent Claim
107 words
A VALVE ASSEMBLY INCLUDING A METAL VALVE ELEMENT HAVING A FRUSTO-CONICAL FRONT END, A PART OF WHICH COMPRISES A SEAT PORTION OF THE VALVE ELEMENT, AND ANNULAR GROOVE IN THE FRUSTO-CONICAL END RADIALLY INWARD FROM SAID SEAT PORTION, THE VALVE ELEMENT BEYOND THE FRUSTCONICAL END EXTENDING AXIALLY AND HAVING A REARWARDLY FACING ANNULAR SURFACE, A PLASTIC COATING OVER THE VALVE ELEMENT, SAID COATING BEING OF SOFTER MATERIAL THAN THE METAL OF THE VALVE ELEMENT AND HAVING A FORWARD END ANCHORED IN THE ANNULAR GROOVE OF THE FRUSTO-CONICAL END, THE COATING BEYOND SAID GROOVE EXTENDING ACROSS THE SEAT PORTION OF THE VALVE ELEMENT AND AXIALLY AND THEN RADIALLY
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |