Patent US2604101A successfully refreshed from Google Patents.
US3607085A
Expired / Lapsed
US
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Method and apparatus for detecting gases or vapors
Assignee: General Electric Co
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Filing: 1969-08-29
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Granted: 1971-09-21
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Expires: 1989-08-29
Abstract
Abstract A method and apparatus for detecting extremely minute quantities of gases and vapors. A condensation nuclei technique of measurement is employed, having a converter that forms a nucleus from a gas-phase reaction between the gaseous material being detected and a volatile reagent in the presence of water. The nuclei forming reaction is augmented by providing a corona discharge in the converter. The reacting materials can be introduced separately or in combination to the converter.
Inventors
- 👤 Serafino J Fusco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:13
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0011; G01N33/0013; Y; Y10; Y10T; Y10T436/00; Y10T436/16; Y10T436/163333
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
21 words
An apparatus as in claim 1 wherein the gaseous reagent is contained in the sample atmosphere when admitted to the converter.
Claim 2
Dependent Claim
23 words
An apparatus as in claim 1 wherein filtering means are employed to remove particulates from the sample atmosphere before admission to the converter.
Claim 3
Dependent Claim
27 words
A apparatus as in claim 1 wherein the means for introducing water into the sample atmosphere is a humidifier connected between the collecting means and the converter.
Claim 4
Dependent Claim
28 words
An apparatus as in claim 1 wherein the converter contains a liquid solution of a volatile reagent for gas phase reaction with any vapor in the sample atmosphere.
Claim 5
Independent Claim
58 words
A method for detecting traces of a reactive vapor in a sample atmosphere which comprises a. introducing water into the sample atmosphere being tested for the vapor b. reacting any vapor in the sample atmosphere with a gaseous reagent by corona discharge means to form condensation nuclei and c. detecting the condensation nuclei by condensation nuclei measuring technique.
Claim 6
Dependent Claim
18 words
A method as in claim 6 wherein the sample atmosphere is humidified before reaction with the gaseous reagent.
Claim 7
Dependent Claim
20 words
A method as in claim 7 wherein the gaseous reagent is obtained from an aqueous solution of a volatile reagent.
Claim 8
Dependent Claim
28 words
A method as in claim 6 wherein the sample atmosphere, the water and the gaseous reagent are all introduced separately into a converter containing the corona discharge means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |