Patent US1469788A successfully refreshed from Google Patents.
US3238323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic pressure differential control switch
Assignee: McDonnell and Miller Inc
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Filing: 1962-06-20
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Granted: 1966-03-01
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Expires: 1982-06-20
Abstract
No abstract record available.
Inventors
- 👤 Elwood H Stonich
- 👤 Leopold J Kmiecik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:26
CPC Classifications
H; H01; H01H; H01H36/00; H01H35/00; H01H35/24; H01H35/40; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
IN COMBINATION, A VALVE HOUSING HAVING SPACED INLET AND OUTLET OPENINGS, A FLUID CHAMBER IN SAID VALVE HOUSING OVERLYING SAID INLET AND OUTLET OPENINGS, DIAPHRAGM MEANS DIVIDING SAID CHAMBER INTO FIRST AND SECOND SECTIONS AND BEING MOVABLE BETWEEN A FIRST AND A SECOND OPERATIVE POSITION, FIRST FLUID PASSAGEWAY MEANS AT ITS ONE END COMMUNICATING WITH SAID INLET OPENING AND AT ITS OTHER END HAVING AN OPEN COMMUNICATING WITH SAID SECOND SECTION OF SAID CHAMBER, SECOND FLUID PASSAGEWAY MEANS AT ITS ONE END COMMUNICATING WITH SAID SECOND SECTION OF SAID CHAMBER AND AT ITS OTHER END COMMUNICATING WITH SAID OUTLET OPENING, A VALVE SLEEVE DISPOSED IN SAID FIRST FLUID PASSAGE MEANS WITH ONE END THEREOF SEATING IN SAID OPENING OF SAID FIRST FLUID PASSAGEWAY MEANS, SAID VALVE SLEEVE HAVING AT LEAST ONE PORT IN THE WALLS THEREOF, A TUBULAR MEMBER AT ITS ONE END SECURED IN SAID DIAPHRAGM MEANS AND COMMUNICATING WITH SAID FIRST SECTION OF SAID CHAMBER AND AT ITS OTHER END PROJECTING INTO SAID VALVE SLEEVE AND COMMUNICATING WITH SAID FIRST FLUID PASSAGEWAY MEANS THROUGH SAID PORT IN SAID
Claim 2
Dependent Claim
180 words
IN COMBINATION, A VALVE HOUSING HAVING SPACED INLET AND OUTLET OPENINGS, A FLUID CHAMBER IN SAID VALVE HOUSING OVERLYING SAID INLET AND OUTLET OPENINGS, DIAPHRAGM MEANS DIVIDING SAID CHAMBER INTO FIRST AND SECOND SECTIONS AND BEING MOVABLE BETWEEN A FIRST AND A SECOND OPERATIVE POSITION, FIRST FLUID PASSAGEWAY MEANS AT ITS ONE END COMMUNICATING WITH SAID INLET OPENING AND AT ITS OTHER END HAVING AN OPEN COMMUNICATING WITH SAID SECOND SECTION OF SAID CHAMBER, SECOND FLUID PASSAGEWAY MEANS AT ITS ONE END COMMUNICATING WITH SAID SECOND SECTION OF SAID CHAMBER AND AT ITS OTHER END COMMUNICATING WITH SAID OUTLET OPENING, A VALVE SLEEVE DISPOSED IN SAID FIRST FLUID PASSAGE MEANS WITH ONE END THEREOF SEATING IN SAID OPENING OF SAID FIRST FLUID PASSAGEWAY MEANS, SAID VALVE SLEEVE HAVING AT LEAST ONE PORT IN THE WALLS THEREOF, A TUBULAR MEMBER AT ITS ONE END SECURED IN SAID DIAPHRAGM MEANS AND COMMUNICATING WITH SAID FIRST SECTION OF SAID CHAMBER AND AT ITS OTHER END PROJECTING INTO SAID VALVE SLEEVE AND COMMUNICATING WITH SAID FIRST FLUID PASSAGEWAY MEANS THROUGH SAID PORT IN SAID
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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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |