Patent US5244976A successfully refreshed from Google Patents.
Patent US3313264A successfully refreshed from Google Patents.
US3313264A
Expired / Lapsed
US
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Pressure indicator
Assignee: Ansul Chemical Co
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Filing: 1964-09-02
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Granted: 1967-04-11
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Expires: 1984-09-02
Abstract
No abstract record available.
Inventors
- 👤 William E Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:31
CPC Classifications
A; A62; A62C; A62C37/00; A62C37/50; G; G01; G01L; G01L7/00; G01L7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A DEVICE FOR INDICATING A REDUCTION OF PRESSURE IN A PRESSURIZED CONTAINER TO A PREDETERMINED LEVEL, COMPRISING: MAIN HOUSING MEANS ADAPTED TO BE SEALING AFFIXED TO SAID PRESSURIZED CONTAINER; MEANS SEALINGLY MOUNTED AT ONE END OF SAID HOUSING MEANS FOR PROVIDING A PRESSURE REDUCTION SIGNAL STATION; A FLEXIBLE, PRESSURE TRANSMITTING DIAPHRAGM MEMBER SEALINGLY MOUNTED TO THE OTHER END OF SAID HOUSING MEANS AND ADAPTED TO EXTEND INTO SAID PRESSURIZED CONTAINER; INDICATOR MEANS FOR SIGNALLING A PRESSURE REDUCTION AT SAID SIGNAL STATION INCLUDING AN ELONGATED PLUNGER MEMBER MOUNTED FOR AXIAL MOVEMENT WITHIN SAID DIAPHRAGM MEANS AND SAID HOUSING MEANS; SAID FLEXIBLE DIAPHRAGM MEMBER ADAPTED TO FRICTIONALLY ENGAGE THE LONGITUDINALLY EXTENDING SIDE SURFACES OF SAID PLUNGER OF SAID INDICATOR MEANS WHEN THE PRESSURE IN SAID CONTAINER IS ABOVE A PREDETERMINED VALUE THEREBY NORMALLY MAINTAINING SAID INDICATOR MEANS IN A FIRST POSI-
Claim 2
Independent Claim
139 words
A DEVICE FOR INDICATING A REDUCTION OF PRESSURE IN A PRESSURIZED CONTAINER TO A PREDETERMINED LEVEL, COMPRISING: MAIN HOUSING MEANS ADAPTED TO BE SEALING AFFIXED TO SAID PRESSURIZED CONTAINER; MEANS SEALINGLY MOUNTED AT ONE END OF SAID HOUSING MEANS FOR PROVIDING A PRESSURE REDUCTION SIGNAL STATION; A FLEXIBLE, PRESSURE TRANSMITTING DIAPHRAGM MEMBER SEALINGLY MOUNTED TO THE OTHER END OF SAID HOUSING MEANS AND ADAPTED TO EXTEND INTO SAID PRESSURIZED CONTAINER; INDICATOR MEANS FOR SIGNALLING A PRESSURE REDUCTION AT SAID SIGNAL STATION INCLUDING AN ELONGATED PLUNGER MEMBER MOUNTED FOR AXIAL MOVEMENT WITHIN SAID DIAPHRAGM MEANS AND SAID HOUSING MEANS; SAID FLEXIBLE DIAPHRAGM MEMBER ADAPTED TO FRICTIONALLY ENGAGE THE LONGITUDINALLY EXTENDING SIDE SURFACES OF SAID PLUNGER OF SAID INDICATOR MEANS WHEN THE PRESSURE IN SAID CONTAINER IS ABOVE A PREDETERMINED VALUE THEREBY NORMALLY MAINTAINING SAID INDICATOR MEANS IN A FIRST POSI-
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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) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |