US3751660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample vaporizing apparatus
Assignee: ATOMIC ENERGY Ltd
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Filing: 1971-07-29
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Granted: 1973-08-07
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Expires: 1991-07-29
Abstract
Abstract An apparatus for vaporizing liquid samples containing impurities comprising a sample vaporizing and vapor receiving member having a surface portion thereof heated above the Leidenfrost point. The vaporized sample is drawn by a vacuum to a mass spectrometer for analysis through a passageway in the member that opens to the heated surface portion. Impurities in the sample remain in the liquid phase.
Inventors
- 👤 W Thurston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:03
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/04; H01J49/0431; H01J49/0409; H01J49/0413; H01J49/0468; H01J49/049; G; G01; G01N; G01N1/00; G01N1/02; G01N1/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
110 words
A liquid sample vaporizing apparatus comprising; a sample container, a tubular vaporizing member having a convex sample contacting metal surface portion, means for heating the surface portion of said member to a temperature above which the liquid no longer wets the metal of the member, said vaporizing member having a vapor conducting passageway opening to a substantially central portion of said surface portion, means for positioning said vaporizing member to contact the sample, a vacuum source communicating with said vapor conducting passageway for drawing off a portion of the sample vaporized by said heated vaporizing member, and means for restricting the flow of vapor drawn off by said vacuum source.
Claim 2
Dependent Claim
110 words
A liquid sample vaporizing apparatus comprising; a sample container, a tubular vaporizing member having a convex sample contacting metal surface portion, means for heating the surface portion of said member to a temperature above which the liquid no longer wets the metal of the member, said vaporizing member having a vapor conducting passageway opening to a substantially central portion of said surface portion, means for positioning said vaporizing member to contact the sample, a vacuum source communicating with said vapor conducting passageway for drawing off a portion of the sample vaporized by said heated vaporizing member, and means for restricting the flow of vapor drawn off by said vacuum source.
Claim 3
Dependent Claim
22 words
The apparatus of claim 1 further comprising means for heating said sample to a temperature less than the boiling point for degassing.
Claim 4
Dependent Claim
34 words
The apparatus of claim 2 comprising a plurality of sample containers, means for advancing said containers for successive sampling, and means for lowering and raising said tubular member in synchronism with said advancing containers.
Claim 5
Dependent Claim
41 words
The apparatus of claim 1 wherein the passageway of said tubular member defines a cavity for receiving a capillary intake probe, said probe being in non-sealing relation with said opening and connected with said vacuum source and a sample analyzing device.
Claim 6
Dependent Claim
97 words
A liquid sample vaporizing apparatus comprising a vaporizing plate member having a concave metal sample receiving portion, means for heating the surface portion of said member to a temperature above which the liquid no longer wets the metal of the member, said plate member having a vapor conducting passageway opening to a substantially central portion of the concave surface portion, a vacuum source communicating with said vapor conducting passageway for drawing off a portion of the sample vaporized by said heated concave member and means for restricting the flow of vapor drawn off by said vacuum source.
Claim 7
Dependent Claim
97 words
A liquid sample vaporizing apparatus comprising a vaporizing plate member having a concave metal sample receiving portion, means for heating the surface portion of said member to a temperature above which the liquid no longer wets the metal of the member, said plate member having a vapor conducting passageway opening to a substantially central portion of the concave surface portion, a vacuum source communicating with said vapor conducting passageway for drawing off a portion of the sample vaporized by said heated concave member and means for restricting the flow of vapor drawn off by said vacuum source.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |