US3879127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sample preparation for sample analysis
Assignee: Bayer Corp
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Filing: 1972-07-12
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Granted: 1975-04-22
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Expires: 1992-07-12
Abstract
Abstract In the analysis of liquids, a whole liquid sample is absorbed onto an absorbent and porous sample carrier, such as a filter paper, and is then traversed by an eluting fluid to carry away one or more constituents of interest for analysis. Elution is preferably carried out under pressure. A sample holder comprises a simple plug and socketed body which are adapted to receive in clamping engagement therebetween a rigid plate of porous material, which acts as a support for a sample carrier.
Inventors
- 👤 Kenneth Storr
- 👤 Marcel Bonnafe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:08
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; G01N1/405
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A method of analysis of liquids, including the preparatory steps of applying a whole blood sample to a sample carrier of absorbent and porous sheet material, treating the sample when absorbed by said carrier to fix a particular constituent of the sample, then traversing said carrier with an eluting fluid to remove a selected unfixed constituent of interest from said carrier for analysis, and passing said eluting fluid containing said selected constituent through a chromatography column for analysis.
Claim 2
Independent Claim
78 words
A method of analysis of liquids, including the preparatory steps of applying a whole blood sample to a sample carrier of absorbent and porous sheet material, treating the sample when absorbed by said carrier to fix a particular constituent of the sample, then traversing said carrier with an eluting fluid to remove a selected unfixed constituent of interest from said carrier for analysis, and passing said eluting fluid containing said selected constituent through a chromatography column for analysis.
Claim 3
Independent Claim
78 words
A method of analysis of liquids, including the preparatory steps of applying a whole blood sample to a sample carrier of absorbent and porous sheet material, treating the sample when absorbed by said carrier to fix a particular constituent of the sample, then traversing said carrier with an eluting fluid to remove a selected unfixed constituent of interest from said carrier for analysis, and passing said eluting fluid containing said selected constituent through a chromatography column for analysis.
Claim 4
Independent Claim
78 words
A method of analysis of liquids, including the preparatory steps of applying a whole blood sample to a sample carrier of absorbent and porous sheet material, treating the sample when absorbed by said carrier to fix a particular constituent of the sample, then traversing said carrier with an eluting fluid to remove a selected unfixed constituent of interest from said carrier for analysis, and passing said eluting fluid containing said selected constituent through a chromatography column for analysis.
Claim 5
Dependent Claim
21 words
A method as claimed in claim 1, comprising the step of applying differential pressure to facilitate traversing by said eluting fluid.
References Cited (Backward Citations)
US3583230A
Cited
US3706661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |