Patent JPS5690735A successfully refreshed from Google Patents.
US3843489A
Expired / Lapsed
US
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Method of determining surface area and meter therefor
Assignee: Westinghouse Electric Corp
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Filing: 1973-05-01
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Granted: 1974-10-22
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Expires: 1993-05-01
Abstract
Abstract 1. A METHOD FOR DETERMINING THE SURFACE AREA OF A SAMPLE, COMPRISING IN COMBINATION: (A) EXPOSING SAID SAMPLE TO A SELECTED GAS; (B) COOLING SAID SAMPLE TO CAUSE SAID GAS TO BE ADSORBED BY SAID SAMPLE; (C) UTILIZING AT LEAST ONE ELECTROCHEMICAL CELL TO GENERATE AT LEAST ONE SIGNAL HAVING A PREDETERMINED RELATIONSHIP TO THE AMOUNT OF SAID GAS ADSORBED BY SAID SAMPLE; AND (D) PROCESSING SAID SIGNAL TO DETERMINE THE SURFACE AREA OF SAID SAMPLE.
Inventors
- 👤 Y Sandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:47
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N15/00; G01N15/08; G01N15/088; G01N15/0893; G01N30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD FOR DETERMINING THE SURFACE AREA OF A SAMPLE, COMPRISING IN COMBINATION: (A) EXPOSING SAID SAMPLE TO A SELECTED GAS; (B) COOLING SAID SAMPLE TO CAUSE SAID GAS TO BE ADSORBED BY SAID SAMPLE; (C) UTILIZING AT LEAST ONE ELECTROCHEMICAL CELL TO GENERATE AT LEAST ONE SIGNAL HAVING A PREDETERMINED RELATIONSHIP TO THE AMOUNT OF SAID GAS ADSORBED BY SAID SAMPLE; AND (D) PROCESSING SAID SIGNAL TO DETERMINE THE SURFACE AREA OF SAID SAMPLE.
Claim 2
Independent Claim
75 words
A METHOD FOR DETERMINING THE SURFACE AREA OF A SAMPLE, COMPRISING IN COMBINATION: (A) EXPOSING SAID SAMPLE TO A SELECTED GAS; (B) COOLING SAID SAMPLE TO CAUSE SAID GAS TO BE ADSORBED BY SAID SAMPLE; (C) UTILIZING AT LEAST ONE ELECTROCHEMICAL CELL TO GENERATE AT LEAST ONE SIGNAL HAVING A PREDETERMINED RELATIONSHIP TO THE AMOUNT OF SAID GAS ADSORBED BY SAID SAMPLE; AND (D) PROCESSING SAID SIGNAL TO DETERMINE THE SURFACE AREA OF SAID SAMPLE.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |