US3237138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral strain transducer
Assignee: Emerson Process Management Ltd
•
Filing: 1963-09-03
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Granted: 1966-02-22
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Robert R Kooiman
- 👤 Robert C Knutson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:10
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0041; G01L9/0051; G01L9/0052; G01L19/00; G01L19/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PRESSURE GAUGE COMPRISING AN OUTER CASE, AN INTERIOR CHAMBER WITHIN SAID CASE, A DIAPHRAGM DIVIDING SAID INTERIOR CHAMBER INTO FIRST AND SECOND CHAMBERS, SAID FIRST CHAMBER BEING OPEN TO A SOURCE OF PRESSURE, A SEMI-CONDUCTOR STRAIN TRANSDUCER, POSITIONED IN SAID SECOND CHAMBER, SAID SEMI-CONDUCTOR STRAIN TRANSDUCER HAVING A TRANSDUCER INTERIOR CHAMBER AND A THIN WALL PORTION, MEANS FOR MOUNTING SAID SEMI-CONDUCTOR STRAIN TRANSDUCER IN SAID SECOND CHAMBER, MEANS TO TRANSMIT PRESSURE FORCE FROM SAID DIAPHRAGM TO SAID TRANSDUCER, AND ELECTRICAL CONNECTION MEANS FOR MEASURING THE RESISTANCE OF AT LEAST A PORTION OF THE THIN WALL OF SAID STRAIN TRANSDUCER.
Claim 2
Dependent Claim
100 words
A PRESSURE GAUGE COMPRISING AN OUTER CASE, AN INTERIOR CHAMBER WITHIN SAID CASE, A DIAPHRAGM DIVIDING SAID INTERIOR CHAMBER INTO FIRST AND SECOND CHAMBERS, SAID FIRST CHAMBER BEING OPEN TO A SOURCE OF PRESSURE, A SEMI-CONDUCTOR STRAIN TRANSDUCER, POSITIONED IN SAID SECOND CHAMBER, SAID SEMI-CONDUCTOR STRAIN TRANSDUCER HAVING A TRANSDUCER INTERIOR CHAMBER AND A THIN WALL PORTION, MEANS FOR MOUNTING SAID SEMI-CONDUCTOR STRAIN TRANSDUCER IN SAID SECOND CHAMBER, MEANS TO TRANSMIT PRESSURE FORCE FROM SAID DIAPHRAGM TO SAID TRANSDUCER, AND ELECTRICAL CONNECTION MEANS FOR MEASURING THE RESISTANCE OF AT LEAST A PORTION OF THE THIN WALL OF SAID STRAIN TRANSDUCER.
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |