Patent US3686923A successfully refreshed from Google Patents.
US3686923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Total sample indicator for chromatography
Assignee: Phillips Petroleum Co
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Filing: 1969-12-16
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Granted: 1972-08-29
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Expires: 1989-12-16
Abstract
Abstract In a chromatographic analyzer, the carrier fluid stream is split at a point downstream from the sample injection. A first portion of the stream is passed through the chromatographic column in a conventional manner. The second portion of the stream is passed directly to the detector to provide an indication of the amount of sample injected.
Inventors
- 👤 John A Favre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:11
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/10; G01N30/62; G01N30/78
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
Analysis apparatus comprising: a chromatographic column having an inlet and an outlet; a detector adapted to provide an output signal representative of the composition of a fluid stream introduced therein; a fluid stream splitter comprising a housing defining an interior chamber and having first, second and third ports communicating with the chamber; first conduit means communicating with said first port to introduce a carrier fluid; sample injection means communicating with said first conduit means to introduce a sample of material to be analyzed into said first conduit means; second conduit means communicating between said second port and the inlet of said chromatographic column; third conduit means communicating between the outlet of said chromatographic column and the inlet of said detector; and fourth conduit means communicating between said third port and said inlet of said detector.
Claim 2
Dependent Claim
135 words
Analysis apparatus comprising: a chromatographic column having an inlet and an outlet; a detector adapted to provide an output signal representative of the composition of a fluid stream introduced therein; a fluid stream splitter comprising a housing defining an interior chamber and having first, second and third ports communicating with the chamber; first conduit means communicating with said first port to introduce a carrier fluid; sample injection means communicating with said first conduit means to introduce a sample of material to be analyzed into said first conduit means; second conduit means communicating between said second port and the inlet of said chromatographic column; third conduit means communicating between the outlet of said chromatographic column and the inlet of said detector; and fourth conduit means communicating between said third port and said inlet of said detector.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 wherein said sample injection means comprises a sample valve.
Claim 4
Dependent Claim
44 words
The apparatus of claim 1, further comprising a recorder, means connecting said detector to said recorder to apply the output signal from said detector to said recorder, and at least one signal attenuating means included in said means connecting said detector to said recorder.
Claim 5
Dependent Claim
31 words
The apparatus of claim 3, further comprising at least one additional signal attenuating means, and means to connect said attenuating means selectively in said means connecting said detector to said recorder.
Claim 6
Dependent Claim
35 words
The apparatus of claim 1, further comprising a mass spectrometer, and conduit means communicating with said third conduit means to direct a portion of fluid passing through said third conduit means to said mass spectrometer.
Claim 7
Independent Claim
77 words
The method of analysis which comprises: introducing a sample of material to be analyzed into a carrier fluid stream; dividing the resulting carrier fluid and sample into first and second streams; passing the first stream directly to the inlet of a detector which is capable of establishing an output signal that is representative of the composition of material passed thereto; and passing the second stream through a chromatographic column and then to said inlet of said detector.
Claim 8
Independent Claim
77 words
The method of analysis which comprises: introducing a sample of material to be analyzed into a carrier fluid stream; dividing the resulting carrier fluid and sample into first and second streams; passing the first stream directly to the inlet of a detector which is capable of establishing an output signal that is representative of the composition of material passed thereto; and passing the second stream through a chromatographic column and then to said inlet of said detector.
Claim 9
Dependent Claim
24 words
The method of claim 6, further comprising passing a portion of said second stream, after passage through the chromatographic column, to a mass spectrometer.
Claim 10
Dependent Claim
86 words
The apparatus of claim 1 wherein said detector has first and second inlets to receive fluid streams and provides an output signal which is representative of a difference between the compositions of two fluid streams passed to the respective first and second inlets thereof, said third conduit means communicates with said first inlet, said fourth conduit means communicates with said first inlet; and further comprising fifth conduit means communicating between said first conduit means and said second inlet to pass carrier fluid to said second inlet.
Claim 11
Dependent Claim
11 words
The apparatus of claim 8 wherein said detector comprises ionization detectors.
Claim 12
Dependent Claim
47 words
The method of claim 6 wherein the first stream is passed to the first inlet of a differential detector having first and second inlets, said second stream is passed to said first inlet; and further comprising passing a portion of said carrier fluid to said second inlet.
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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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |