US3152608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: MORRISON CO
•
Filing: 1962-01-15
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Granted: 1964-10-13
•
Expires: 1982-01-15
Abstract
No abstract record available.
Inventors
- 👤 George F Morrison
- 👤 Herman C Frentzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/16; F16K15/02; F16K15/03; F16K15/031; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/7891; Y10T137/7898
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A CHECK VALVE COMPRISING, IN COMBINATION, AN ANNULAR VALVE SEAT OF TETRAFLUORETHYLENE, A VALVE OF SILICON RUBBER HAVING A FACE NORMALLY IN ENGAGEMENT WITH SAID VALVE SEAT AND A NECK PORTION FORMING A HINGE FOR MOVEMENT OF SAID FACE INTO AND OUT OF ENGAGEMENT WITH SAID VALVE SEAT, A METALLIC DISK MOLDED WITHIN AND COMPLETELY SURROUNDED BY SAID SILICON RUBBER, SAID METALLIC DISK BEING IN SUBSTANTIAL ALIGNMENT WITH SAID VALVE SEAT, A MOUNTING PLATE INCLUDING TWO PAIRS OF ALIGNED ELONGATED APERTURES AND HAVING SAID SILICON RUBBER EXTENDING ON EITHER SIDE OF SAID MOUNTING PLATE AND THROUGH ONE OF SAID PAIRS OF APERTURES, AND FASTENING MEANS DISPOSED,
Claim 2
Dependent Claim
106 words
A CHECK VALVE COMPRISING, IN COMBINATION, AN ANNULAR VALVE SEAT OF TETRAFLUORETHYLENE, A VALVE OF SILICON RUBBER HAVING A FACE NORMALLY IN ENGAGEMENT WITH SAID VALVE SEAT AND A NECK PORTION FORMING A HINGE FOR MOVEMENT OF SAID FACE INTO AND OUT OF ENGAGEMENT WITH SAID VALVE SEAT, A METALLIC DISK MOLDED WITHIN AND COMPLETELY SURROUNDED BY SAID SILICON RUBBER, SAID METALLIC DISK BEING IN SUBSTANTIAL ALIGNMENT WITH SAID VALVE SEAT, A MOUNTING PLATE INCLUDING TWO PAIRS OF ALIGNED ELONGATED APERTURES AND HAVING SAID SILICON RUBBER EXTENDING ON EITHER SIDE OF SAID MOUNTING PLATE AND THROUGH ONE OF SAID PAIRS OF APERTURES, AND FASTENING MEANS DISPOSED,
References Cited (Backward Citations)
US1956691A
Cited
US2159484A
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US2730115A
Cited
US2793654A
Cited
US2946554A
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |