US5250093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water management device for gas chromatography sample concentration
Assignee: OI Corp
•
Filing: 1992-03-09
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Granted: 1993-10-05
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Expires: 2012-03-09
Abstract
Abstract A water management system removes water vapor from the analyte slug that is desorbed from the trap. The water management system includes a device having a passage through which the volatile organic chemicals and water pass, the passage being designed to remove water vapor by swirling action on the stream. The amount of water removed is more than can be accounted for by simple condensation. The invention also includes the adjustment of the temperature of the water management device during the sample concentration cycle to prevent undesired condensation prior to desorption.
Inventors
- 👤 Kenneth K. Jiang
- 👤 Bernie B. Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:53
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/14; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0011; G01N33/18; G01N33/1826; G01N33/24; G01N33/241; G01N2030/022; G01N2030/025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
An apparatus for removing water vapor from the analyte slug in a sample concentration system for gas chromatography, comprising: a. a body positioned in the flow path between a trap and gas chromatograph; b. a passage extending through said body, said passage having a first section and a second section intersecting the first section, the first section having an outlet communicating with the second section, the outlet substantially tangential to the second section and having a smaller diameter than the second section; c. at least a portion of the second section of said passage having a non-smooth surface; and d. a reservoir adjoining the second section of the passage for drainage of water vapor therein.
Claim 2
Independent Claim
115 words
An apparatus for removing water vapor from the analyte slug in a sample concentration system for gas chromatography, comprising: a. a body positioned in the flow path between a trap and gas chromatograph; b. a passage extending through said body, said passage having a first section and a second section intersecting the first section, the first section having an outlet communicating with the second section, the outlet substantially tangential to the second section and having a smaller diameter than the second section; c. at least a portion of the second section of said passage having a non-smooth surface; and d. a reservoir adjoining the second section of the passage for drainage of water vapor therein.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 wherein said portion of the second section of the passage is an internally threaded cylindrical surface.
Claim 4
Dependent Claim
19 words
The apparatus of claim 1 wherein said portion of the second section of the passage if frustoconical in shape.
Claim 5
Dependent Claim
53 words
The apparatus of claim 1 further comprising: (a) heating means functionally connected to said body; (b) cooling means positioned to cool said body to ambient room temperature; and (c) temperature sensing and control means to monitor the temperature of said body and activate said heating means and cooling means according to pre-selected programs.
Claim 6
Dependent Claim
40 words
The apparatus of claim 4 wherein the heating means comprises a heating cartridge insertable into a bore in the body, the heating cartridge adapted to heat the body to a selected temperature sufficient to expel water vapor from the reservoir.
Claim 7
Dependent Claim
27 words
The apparatus of claim 1 wherein the outlet of the first section of the passage comprises a stepped reduction in the internal diameter of the first section.
Claim 8
Dependent Claim
23 words
The apparatus of claim 1 wherein the second section of the passage is vertically aligned such that water will drain into the reservoir.
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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) | 1996-10-04 | 1997-04-05 | 1997-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-04 | 2001-04-05 | 2001-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-04 | 2005-04-05 | 2005-10-05 | $7700.00 | Window Closed / Lapsed |