US3590247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for monitoring a gaseous atmosphere for radioactive isotopes including organic iodine compounds
Assignee: Individual
•
Filing: 1969-05-19
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Granted: 1971-06-29
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Expires: 1989-05-19
Abstract
Abstract Air near, for example, a nuclear reactor, is monitored for radioactive isotopes including organic iodine compounds by adding a trace addition of fluorine, chlorine or bromine so that the isotopes will be adsorbed by a charcoal-loaded filter paper. The filter paper is then analyzed for radioactivity.
Inventors
- 👤 Richard Moore Holford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:27
CPC Classifications
G; G01; G01T; G01T7/00; G01T7/02; G01T7/04; Y; Y10; Y10T; Y10T436/00; Y10T436/19; Y10T436/196666
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
A method according to claim 1, wherein the said filtering medium is impregnated with said gaseous halogen before said stream containing said gaseous halogen is passed through said filtering medium, and said gaseous halogen is introduced as a metered-trace addition into said stream.
Claim 2
Dependent Claim
52 words
A method according to claim 2, wherein said gaseous halogen is evaporated bromine and is introduced into the said stream as a trace addition by passing a separated portion of said stream through an evaporated portion of liquid bromine, and then recombining said separated portion of said stream with the remainder thereof.
Claim 3
Dependent Claim
26 words
A method according to claim 1, wherein gaseous halogen remaining in the said stream, after it has passed through the said filtering medium, is filtered therefrom.
Claim 4
Dependent Claim
69 words
Monitoring apparatus, adapted to monitor a gaseous atmosphere for radioactive iodine isotopes including organic iodine compounds, comprising means for introducing gaseous halogen, selected from the group fluorine, chlorine and bromine, into a stream of the atmosphere, a charcoal-loaded fibrous sheet material filtering medium through which the stream containing said gaseous halogen is passed to remove said radioactive iodine isotopes, and means for analyzing the said filtering medium for radioactivity.
Claim 5
Dependent Claim
41 words
Apparatus according to claim 5, wherein means is provided for initially impregnating said filtering medium with said gaseous halogen, and said means for introducing gaseous halogen into said stream includes metering means for introducing a metered trace addition into said stream.
Claim 6
Dependent Claim
44 words
Apparatus according to claim 5, wherein said means for introducing gaseous halogen into said stream comprises means containing evaporated liquid bromine, means for separating a portion of said stream from the remainder thereof, and means for passing said separated portion through said evaporated bromine.
Claim 7
Dependent Claim
28 words
Apparatus according to claim 5, wherein a filtering means is provided for filtering gaseous halogen from said stream which has not been filtered therefrom by said filtering medium.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |