US5112490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample filtration, separation and dispensing device
Assignee: Bio Chem Laboratory Systems Inc
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Filing: 1991-01-04
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Granted: 1992-05-12
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Expires: 2011-01-04
Abstract
Abstract An apparatus for dispensing a predetermined amount of a sample into a fluid. The apparatus comprises a chamber which may be inserted into a cuvette. The chamber comprises a means such as a membrane or filter ball for dispensing a predeterming amount of a sample into a fluid upon contact of said membrane or filter ball and said sample by said fluid. The fluid is brought into contact with the sample by vortexing the fluid with a vortex mixer.
Inventors
- 👤 Jon Turpen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:21
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01D; B01D61/00; B01D61/14; B01D61/18; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375; Y10T436/255
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
A method of dispensing a predetermined amount of a sample comprising blood plasma and at least one reagent from a membrane into a fluid, wherein said at least one reagent is capable of reacting with said blood plasma and said fluid, said method comprising: exposing a predetermined area of a surface of said membrane containing said sample to contact with said fluid; and vortexing said fluid to a predetermined velocity for a predetermined time, whereby said fluid contacts said membrane and said sample contained on said surface of said membrane, whereby a predetermined amount of said sample is dispensed from said membrane into said fluid.
Claim 2
Independent Claim
105 words
A method of dispensing a predetermined amount of a sample comprising blood plasma and at least one reagent from a membrane into a fluid, wherein said at least one reagent is capable of reacting with said blood plasma and said fluid, said method comprising: exposing a predetermined area of a surface of said membrane containing said sample to contact with said fluid; and vortexing said fluid to a predetermined velocity for a predetermined time, whereby said fluid contacts said membrane and said sample contained on said surface of said membrane, whereby a predetermined amount of said sample is dispensed from said membrane into said fluid.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein said fluid is a primary reagent capable of reacting with said blood plasma.
References Cited (Backward Citations)
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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) | 1995-05-12 | 1995-11-11 | 1996-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-12 | 1999-11-11 | 2000-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-12 | 2003-11-11 | 2004-05-12 | $7700.00 | Window Closed / Lapsed |