Patent US3245265A successfully refreshed from Google Patents.
US3245265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge diffusion pressure transducer
Assignee: SRI International Inc
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Filing: 1964-07-08
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Granted: 1966-04-12
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Expires: 1984-07-08
Abstract
No abstract record available.
Inventors
- 👤 Dan W Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:14
CPC Classifications
G; G01; G01L; G01L11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
APPARATUS FOR MEASURING THE UNKNOWN PRESSURE OF A GAS COMPRISING A SOURCE OF SAID GAS AT A KNOWN PRESSURE, A MATERIAL WHOSE ANION IS THAT OF SAID GAS HAVING TWO OPPOSITE SURFACES, ONE OF SAID SURFACES BEING EXPOSED TO SAID GAS AT SAID KNOWN PRESSURE AND THE OPPOSITE SURFACE BEING EXPOSED TO SAID GAS AT SAID UNKNOWN PRESSURE, AND MEANS FOR MEASURING THE VOLTAGE DIFFERENCE ESTABLISHED AT THE TWO OPPOSITE SURFACES OF SAID MATERIAL IN RESPONSE TO THE DIFFERENCE IN SAID GAS PRESSURES TO WHICH IT IS EXPOSED.
Claim 2
Dependent Claim
88 words
APPARATUS FOR MEASURING THE UNKNOWN PRESSURE OF A GAS COMPRISING A SOURCE OF SAID GAS AT A KNOWN PRESSURE, A MATERIAL WHOSE ANION IS THAT OF SAID GAS HAVING TWO OPPOSITE SURFACES, ONE OF SAID SURFACES BEING EXPOSED TO SAID GAS AT SAID KNOWN PRESSURE AND THE OPPOSITE SURFACE BEING EXPOSED TO SAID GAS AT SAID UNKNOWN PRESSURE, AND MEANS FOR MEASURING THE VOLTAGE DIFFERENCE ESTABLISHED AT THE TWO OPPOSITE SURFACES OF SAID MATERIAL IN RESPONSE TO THE DIFFERENCE IN SAID GAS PRESSURES TO WHICH IT IS EXPOSED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |