US4225316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical agent detection method and apparatus
Assignee: United States Department of the Navy
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Filing: 1961-11-28
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Granted: 1980-09-30
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Expires: 1981-11-28
Abstract
Abstract 1. The method of detecting predetermined organic halogen compounds in a gasomprising the steps of directing a sample of said gas into a reaction chamber containing immobilized therein a halogen compound in which the halogen constituent is radioactive, providing environmental conditions in said chamber to promote a chemical reaction whereby said radioactive constituent forms a mobile compound with a constituent of said organic halogen compound, and passing said sample including any of said mobile compound generated out of said reaction chamber and into the presence of a radiation detector.
Inventors
- 👤 Seymour Z. Lewin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:07
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; G01N33/0036; G01N33/0047; G01N33/0049; G01N33/0011; G01N33/0013; Y; Y10; Y10T; Y10T436/00; Y10T436/19; Y10T436/196666
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
89 words
The method of detecting predetermined organic halogen compounds in a gas comprising the steps of directing a sample of said gas into a reaction chamber containing immobilized therein a halogen compound in which the halogen constituent is radioactive, providing environmental conditions in said chamber to promote a chemical reaction whereby said radioactiive constituent forms a mobile compound with a constituent of said organic halogen compound and passing said sample including any of said mobile compound generated out of said reaction chamber and into the presence of a radiation detector.
Claim 2
Independent Claim
89 words
The method of detecting predetermined organic halogen compounds in a gas comprising the steps of directing a sample of said gas into a reaction chamber containing immobilized therein a halogen compound in which the halogen constituent is radioactive, providing environmental conditions in said chamber to promote a chemical reaction whereby said radioactiive constituent forms a mobile compound with a constituent of said organic halogen compound and passing said sample including any of said mobile compound generated out of said reaction chamber and into the presence of a radiation detector.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein a non-halogen constituent of said halogen compound is silver.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein said halogen constituent is bromine.
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein said halogen constituent is iodine.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein said halogen constituent is chlorine.
Claim 7
Dependent Claim
11 words
The method of claim 1 wherein said halogen constituent is fluorine.
Claim 8
Dependent Claim
66 words
The method of claim 1 further including the steps of measuring the radioactivity of said radioactive constituent with said radiation detector and providing an indication proportional to the radiation detected by said radiation detector and measuring the radioactivity of the immobilized radioactive halogen constituent in the reaction chamber with a second radiation detector and providing an indication inversely proportional to the radioactivity of said radioactive constituent.
Claim 9
Dependent Claim
28 words
The method of claim 1 further including the step of pyrolizing said organic halogen compound to promote the reaction between said organic halogen compound and said halogen compound.
Claim 10
Dependent Claim
20 words
The method as claimed in claim 1 wherein said reaction chamber is maintained at a temperature substantially above room temperature.
Claim 11
Dependent Claim
55 words
The method as claimed in claim 1 further including the step of passing said sample after the radiation therefrom has been detected into contact with a material having an affinity for said radioactive halogen element thereby trapping a substantial portion of said radioactive element to render said gaseous sample safe for release from the apparatus.
Claim 12
Dependent Claim
127 words
Apparatus for the detection of predetermined organic chemical agents in a gaseous atmosphere comprising a reaction chamber, means for transmitting a sample of gaseous atmosphere into said reaction chamber, a quantity of immobilized halogen compound in said reaction chamber, the halogen constituent of said compound being radioactive, means for controlling the temperature of said reaction chamber, means for measuring the radioactivity of the immobilized halogen compound in said reaction chamber, means for providing a signal inversely proportional to the radioactivity of the immobilized halogen compound an outlet from said reaction chamber, means disposed away from said reaction chamber for measuring the radioactivity of the gas emitted from said reaction chamber, and means for providing an indication proportional to the radioactivity of the gas emitted from said chamber.
Claim 13
Dependent Claim
127 words
Apparatus for the detection of predetermined organic chemical agents in a gaseous atmosphere comprising a reaction chamber, means for transmitting a sample of gaseous atmosphere into said reaction chamber, a quantity of immobilized halogen compound in said reaction chamber, the halogen constituent of said compound being radioactive, means for controlling the temperature of said reaction chamber, means for measuring the radioactivity of the immobilized halogen compound in said reaction chamber, means for providing a signal inversely proportional to the radioactivity of the immobilized halogen compound an outlet from said reaction chamber, means disposed away from said reaction chamber for measuring the radioactivity of the gas emitted from said reaction chamber, and means for providing an indication proportional to the radioactivity of the gas emitted from said chamber.
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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) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |