US3678734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analysis of fluids
Assignee: Bayer Corp
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Filing: 1970-10-01
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Granted: 1972-07-25
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Expires: 1990-10-01
Abstract
Abstract Automatic apparatus is described for the analysis of two or more constituents of interest present in widely varying concentrations in liquid samples by a common analytical device or detector selective with respect to such constituents. The liquid samples are directed successively along the apparatus as in initial stream, which is divided into two or more streams. The two or more streams are differentially diluted and reacted, so as to be accommodated by the common detector, prior to being passed alternatively and in succession to the common detector.
Inventors
- 👤 Douglas Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:04
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
216 words
Apparatus for the analysis of sample fluids for two or more constituents of interest comprising: means for passing fluid samples successively as a first stream, means connected to said passing means for forming second and third streams, each of said second and third streams including portions of said successive fluid samples in said first stream, means for diluting said sample portions in at least one of said second and third streams, respectively whereby said sample portions in said second and third streams are differentially diluted, means for introducing a standard solution into selected ones of said second and third streams, common analytical means selective with respect to said two or more constituents of interest and said standard solution and operative to accommodate said differentially diluting sample portions in said second and third streams, said common analytical means including means for storing signals arising from the analysis of said constituents of interest in said first and second streams and additional means for storing signals arising from said standard solution, said storing means and said additional storing means being cooperative to express the ratio of the signal arising from a corresponding constituent of interest and the signal arising from said standard solution, and valving means for alternately directing said second and third streams to said common analytical means.
Claim 2
Dependent Claim
216 words
Apparatus for the analysis of sample fluids for two or more constituents of interest comprising: means for passing fluid samples successively as a first stream, means connected to said passing means for forming second and third streams, each of said second and third streams including portions of said successive fluid samples in said first stream, means for diluting said sample portions in at least one of said second and third streams, respectively whereby said sample portions in said second and third streams are differentially diluted, means for introducing a standard solution into selected ones of said second and third streams, common analytical means selective with respect to said two or more constituents of interest and said standard solution and operative to accommodate said differentially diluting sample portions in said second and third streams, said common analytical means including means for storing signals arising from the analysis of said constituents of interest in said first and second streams and additional means for storing signals arising from said standard solution, said storing means and said additional storing means being cooperative to express the ratio of the signal arising from a corresponding constituent of interest and the signal arising from said standard solution, and valving means for alternately directing said second and third streams to said common analytical means.
Claim 3
Dependent Claim
46 words
Apparatus according to claim 1 wherein said valving means includes means for directing each of second and third streams alternately between said common analytical means and waste, one of said second and third streams being directed by said valving means to waste at any one time.
Claim 4
Dependent Claim
42 words
Apparatus according to claim 1 further including means for processing said second and third streams, respectively, for at least one of said two or more constituents of interest and prior to being directed by said valving means to said common analytical means.
Claim 5
Dependent Claim
40 words
Apparatus according to claim 1 wherein said common analytical means is operative to analyze said two or more constituents of interest in phase with the operation of said valving means and in phase with the operation of said passing means.
Claim 6
Dependent Claim
21 words
Apparatus according to claim 1 where the operation of said storing means is phased with the operation of said valving means.
Claim 7
Dependent Claim
37 words
Apparatus according to claim 1 wherein said common analytical means includes means for generating an electrical signal indicative of the concentration of said constituents of interest and said standard solution, and said storing means include integrating circuits.
Claim 8
Dependent Claim
57 words
Apparatus according to claim 1 wherein said common analytical means comprises means for quantitatively analyzing said differentially diluted sample portions directed thereto through said valving means for said two or more constituents of interest, and means for indicating the respective quantities of said two or more constituents of interest in each of said diFferentially diluted sample portions.
Claim 9
Dependent Claim
36 words
Apparatus according to claim 7 wherein said indicating means includes means for providing electrical signals indicative of the respective quantities of said two or more constituents of interest in each of said differentially diluted sample portions.
Claim 10
Dependent Claim
30 words
Apparatus according to claim 7 wherein said common analytical means includes means for storing said electrical signals indicative of the respective quantities of said two or more constituents of interest.
References Cited (Backward Citations)
US3422667A
Cited
US3523733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |