US4312835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal control means for liquid chromatograph samples
Assignee: Wyeth Holdings LLC
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Filing: 1980-04-21
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Granted: 1982-01-26
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Expires: 2000-04-21
Abstract
Abstract A Peltier effect thermal control sample containment means for an automatic sample holding apparatus used in conjunction with a liquid chromatograph analysis. The apparatus provides for the cooling or heating of a plurality of liquid chromatography samples and the maintenance of said samples at specific temperatures for extended periods of time.
Inventors
- 👤 Bart J. Zoltan
- 👤 Richard A. Leese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:20
CPC Classifications
F; F25; F25B; F25B21/00; F25B21/02; G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/26; G01N30/28; G01N30/30; G01N2030/303
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
125 words
In a liquid chromatographic sampling device having an automatic sample injector, the improvement comprising a thermal control sample containment means comprising: (a) sample holder body of a heat conductive material having from one to a plurality of sample contaimment means and from one to a plurality of (b) Peltier devices, said devices each having an active surface and a reactive surface and said sample holder body being in intimate contact with the active surface of each Peltier device adapted to provide cooling or heating of the samples being chromatographed and (c) insulation between said sample holder body and said reactive surface of each Peltier device and each said reactive surface of each said Peltier device being in intimate contact with (d) a heat exchange means.
Claim 2
Dependent Claim
125 words
In a liquid chromatographic sampling device having an automatic sample injector, the improvement comprising a thermal control sample containment means comprising: (a) sample holder body of a heat conductive material having from one to a plurality of sample contaimment means and from one to a plurality of (b) Peltier devices, said devices each having an active surface and a reactive surface and said sample holder body being in intimate contact with the active surface of each Peltier device adapted to provide cooling or heating of the samples being chromatographed and (c) insulation between said sample holder body and said reactive surface of each Peltier device and each said reactive surface of each said Peltier device being in intimate contact with (d) a heat exchange means.
Claim 3
Dependent Claim
136 words
In a liquid chromatography sampling device having an automatic sample injector, the improvement comprising a thermal control sample containment means capable of reducing sample temperature from about 20°-25° C. to about 0°-4° C. comprising: (a) sample holder body of a heat conductive material having from one to a plurality of sample containment means and from one to a plurality of (b) Peltier devices, said devices each having an active surface and a reactive surface and said sample holder body being in intimate contact with the active surface of each Peltier device adapted to provide cooling of the samples being chromatographed and (c) insulation between said sample holder body and said reactive surface of each Peltier device and each said reactive surface of each said Peltier device being in intimate contact with (d) a heat exchange means.
Claim 4
Dependent Claim
136 words
In a liquid chromatography sampling device having an automatic sample injector, the improvement comprising a thermal control sample containment means capable of reducing sample temperature from about 20°-25° C. to about 0°-4° C. comprising: (a) sample holder body of a heat conductive material having from one to a plurality of sample containment means and from one to a plurality of (b) Peltier devices, said devices each having an active surface and a reactive surface and said sample holder body being in intimate contact with the active surface of each Peltier device adapted to provide cooling of the samples being chromatographed and (c) insulation between said sample holder body and said reactive surface of each Peltier device and each said reactive surface of each said Peltier device being in intimate contact with (d) a heat exchange means.
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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) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |