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US3744219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-loop chromatography system
Assignee: United States Department of the Interior
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Filing: 1972-02-29
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Granted: 1973-07-10
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Expires: 1992-02-29
Abstract
Abstract An automated chromatography system employs multiple-port rotary valves for sample storage, introduction and collection. Between the corresponding stator ports of a pair of valves, multiple sample loops are connected in series with inlet and outlet ports by rotating the mechanically linked valve rotors. A third mechanically linked rotary valve distributes the output of a chromatography column to a series of independent sample receivers.
Inventors
- 👤 R Tindle
- 👤 D Stalling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:25
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/80; G01N30/82; G01N30/04; G01N30/24; G01N30/16; G01N30/20; G01N2030/207; G01N2030/208; G01N30/84; G01N2030/8411
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
A chromatography system comprising: a plurality of independent sample loops, means for loading a separate fluid sample into each loop, a fluid pump, a chromatography column, means for alternately connecting each sample loop in series with the pump and the chromatography column for injecting the samples into the column, means for collecting each sample in an independent reservoir, means for alternately diverting the column output into the means for collecting or into a waste receptacle, and means for timing the operating sequence of the elements in the system to automatically perform a series of chromatographic operations upon the separate fluid samples.
Claim 2
Dependent Claim
101 words
A chromatography system comprising: a plurality of independent sample loops, means for loading a separate fluid sample into each loop, a fluid pump, a chromatography column, means for alternately connecting each sample loop in series with the pump and the chromatography column for injecting the samples into the column, means for collecting each sample in an independent reservoir, means for alternately diverting the column output into the means for collecting or into a waste receptacle, and means for timing the operating sequence of the elements in the system to automatically perform a series of chromatographic operations upon the separate fluid samples.
Claim 3
Dependent Claim
89 words
A chromatography system as claimed in claim 1 in which: the means for alternately connecting each sample loop in series with the chromatography column includes first and second rotary fluid valves, each rotary valve including a first port and a plurality of independent second ports, with means for alternately connecting the one port in series with each of the independent second ports, the plurality of independent sample loops being connected between the corresponding second ports on the first and second valves, and means for synchronously rotating the rotary valves.
Claim 4
Dependent Claim
60 words
A chromatography system as claimed in claim 1 in which: the means for collecting each sample in an independent reservoir includes a rotary fluid valve with a first port and a plurality of independent second ports, with means for alternately connecting the one port in series with each of the independent second ports, and means for rotating the rotary valve.
Claim 5
Dependent Claim
68 words
A chromatography system as claimed in claim 2 in which: the means for collecting each sample in an independent reservoir includes a third rotary valve with a first port and a plurality of independent second ports, with means for alternately connecting the one port in series with each of the independent second ports, and means for rotating the third valve in synchronism with the first and second valves.
Claim 6
Dependent Claim
19 words
A chromatography column as claimed in claim 2 in which: the means for synchronously rotating includes a rotary solenoid.
Claim 7
Dependent Claim
18 words
A chromatography system as claimed in claim 3 in which: the means for rotating is a rotary solenoid.
Claim 8
Dependent Claim
20 words
A chromatography system as claimed in claim 4 in which: the means for rotating in synchronism includes a rotary solenoid.
Claim 9
Dependent Claim
22 words
A chromatography system as claimed in claim 2 in which: the first and second rotary valves are linked by a common shaft.
Claim 10
Dependent Claim
23 words
A chromatography system as claimed in claim 4 in which: the first, second, and third rotary valves are linked by a common shaft.
Claim 11
Dependent Claim
28 words
A chromatography system as claimed in claim 5 in which: the first and second rotary valves are linked by a common shaft and driven by a common solenoid.
Claim 12
Dependent Claim
29 words
A chromatography sYstem as claimed in claim 7 in which: the first, second and third rotary valves are linked by a common shaft and driven by a common solenoid.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |