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US3138027A
Expired / Lapsed
US
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Pressure gage
Assignee: Individual
•
Filing: 1959-07-27
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Granted: 1964-06-23
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Expires: 1979-07-27
Abstract
No abstract record available.
Inventors
- 👤 Yao T Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0041; G01L9/0051; G01L9/006
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A PRESSURE GAGE COMPRISING A CYLINDRICAL FRAME, A DIAPHRAGM SECURED AT ITS PERIPHERY TO AND CLOSING ONE END OF THE FRAME, SAID DIAPHRAGM HAVING A FLAT CIRCULAR CENTRAL PORTION AND A SURROUNDING ANNULAR DISHED PORTION, RESTRAINING MEANS INCLUDING A COLUMN HAVING A FLAT END IN FACE TO FACE CONTACT WITH THE ENTIRE INNER SIDE OF THE FLAT PORTION OF THE DIAPHRAGM, SECURING MEANS CONFINED TO THE INNER SIDE OF THE FLAT PORTION OF THE DIAPHRAGM SECURING THE COLUMN TO SAID FLAT PORTION, SAID RESTRAINING MEANS BEING SECURED TO THE FRAME AND EXERTING SUBSTANTIALLY ALL THE ELASTIC RESTRAINT AGAINST PRESSURE EXERTED AGAINST THE DIAPHRAGM, AND A SIGNAL GENERATOR OPERATIVELY CONNECTED TO SAID RESTRAINING MEANS PROVIDING A SIGNAL IN RESPONSE TO MOVEMENT OF SAID MEANS.
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |