Patent US3315518A successfully refreshed from Google Patents.
US3315518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidity sensing devices
Assignee: Research Corp
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Filing: 1966-02-07
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Granted: 1967-04-25
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Expires: 1986-02-07
Abstract
No abstract record available.
Inventors
- 👤 Robert J Charlson
- 👤 Konrad J K Buettner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:54
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/22; G01N27/223; G01N27/225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
APPARATUS FOR THE MEASUREMENT OF THE MOISTURE CONTENT OF A GAS COMPRISING A PAIR OF SPACED ELECTRICALLY CONDUCTIVE MEMBERS, A FLUID PERMEABLE BODY OF A SUBSTRATE HAVING A LARGE RATIO OF SURFACE AREA TO MASS POSITIONED BETWEEN SAID CONDUCTIVE MEMBERS AND CARRYING A COATING LAYER OF A NON-IONIZING HYGROSCOPIC LIQUID, SAID SUBSTRATE BEING FABRICATED OF A NON-HYGROSCOPIC, NON-AGSORBENT, POLYMERIC SOLID HAVING A DIELECTRIC CONSTANT BELOW 4, GAS INLET AND OUTLET PASSAGES FOR PASSING A GAS THROUGH SAID BODY AND CIRCUIT ELEMENTS INCLUDING MEANS RESPONSIVE TO CHANGES IN AN ELECTRIC PARAMETER OF SAID HYGROSCOPIC LIQUID LAYER ELECTRICALLY CONNECTING SAID SPACED CONDUCTIVE MEMBERS.
Claim 2
Dependent Claim
101 words
APPARATUS FOR THE MEASUREMENT OF THE MOISTURE CONTENT OF A GAS COMPRISING A PAIR OF SPACED ELECTRICALLY CONDUCTIVE MEMBERS, A FLUID PERMEABLE BODY OF A SUBSTRATE HAVING A LARGE RATIO OF SURFACE AREA TO MASS POSITIONED BETWEEN SAID CONDUCTIVE MEMBERS AND CARRYING A COATING LAYER OF A NON-IONIZING HYGROSCOPIC LIQUID, SAID SUBSTRATE BEING FABRICATED OF A NON-HYGROSCOPIC, NON-AGSORBENT, POLYMERIC SOLID HAVING A DIELECTRIC CONSTANT BELOW 4, GAS INLET AND OUTLET PASSAGES FOR PASSING A GAS THROUGH SAID BODY AND CIRCUIT ELEMENTS INCLUDING MEANS RESPONSIVE TO CHANGES IN AN ELECTRIC PARAMETER OF SAID HYGROSCOPIC LIQUID LAYER ELECTRICALLY CONNECTING SAID SPACED CONDUCTIVE MEMBERS.
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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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |