Patent US4954150A successfully refreshed from Google Patents.
US4954150A
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Device for branching gas flows
Assignee: Givaudan Roure Corp
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Filing: 1988-10-07
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Granted: 1990-09-04
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Expires: 2008-10-07
Abstract
Abstract A device for branching gas flows, more particularly in a gas chromatography plant, the device having: an inlet branch connected to the output of a separating column; and two outlet branches which extend from a junction to subsequent parts of the plant, characterised in that one outlet branch is connected by way of a shutoff valve to a device producing a pressure lower than the pressure in the other outlet branch.
Inventors
- 👤 Franz Etzweiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:00
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N30/46; G01N30/461; G01N2030/382; G01N2030/383; G01N30/04; G01N30/06; G01N30/10; G01N30/468; G01N30/80
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
A device for branching gas flows, more particularly in a gas chromatograph, the device having an inlet branch connected to the output of a separating column; two outlet branches which extend from a junction to subsequent parts of the plant, characterized in that a first outlet branch (6) is connected by way of a shutoff valve (10) to means producing a pressure lower than the pressure in the other outlet branch (5); an interceptor in the first outlet branch (6) between the junction and the valve (10); and a scavenging gas feed (11) between the junction and the interceptor extending into the first outlet branch (6).
Claim 2
Independent Claim
106 words
A device for branching gas flows, more particularly in a gas chromatograph, the device having an inlet branch connected to the output of a separating column; two outlet branches which extend from a junction to subsequent parts of the plant, characterized in that a first outlet branch (6) is connected by way of a shutoff valve (10) to means producing a pressure lower than the pressure in the other outlet branch (5); an interceptor in the first outlet branch (6) between the junction and the valve (10); and a scavenging gas feed (11) between the junction and the interceptor extending into the first outlet branch (6).
Claim 3
Dependent Claim
29 words
A device according to claim 1, characterized in that the interceptor comprises a number of adsorption tubes and means for alternately connecting said adsorption tubes into the flow path.
References Cited (Backward Citations)
SU161967A1
Cited
CA692119A
Cited
GB826110A
Cited
US3357233A
Cited
US3536452A
Cited
US3422665A
Cited
US3408793A
Cited
US3494174A
Cited
US3721065A
Cited
DE2520075A1
Cited
GB2021969A
Cited
DE2840612A1
Cited
US4442217A
Cited
US4470832A
Cited
US4478720A
Cited
US4617032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |