Patent US5187100A successfully refreshed from Google Patents.
US5187100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion to limit penetration of aqueous solutions into a membrane
Assignee: LifeScan Inc
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Filing: 1991-11-19
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Granted: 1993-02-16
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Expires: 2011-11-19
Abstract
Abstract A control solution for use with a porous reagent strip comprises a flexible semisolid polymer dispersed in water, such as polyvinyl acetate in distilled water, with appropriate control glucose concentration levels. This solution is useful in mimicking whole blood in conjunction with porous reagent strips to determine compliance of the strips and meters to established measurement and performance criteria.
Inventors
- 👤 David P. Matzinger
- 👤 Maria Teodorczyk
- 👤 Darwin R. Poulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:19
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/96; G01N2496/00; G01N2496/25; G01N33/66; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/02; Y10T; Y10T436/00; Y10T436/10; Y10T436/104998; Y10T436/106664
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
41 words
A control solution which mimics whole blood, for use with a porous reagent strip comprising: a suspension of about 40% to about 55% solid polyvinyl acetate particles dispersed in water, and a dispersant to maintain said particles in suspension and glucose.
Claim 2
Dependent Claim
41 words
A control solution which mimics whole blood, for use with a porous reagent strip comprising: a suspension of about 40% to about 55% solid polyvinyl acetate particles dispersed in water, and a dispersant to maintain said particles in suspension and glucose.
Claim 3
Dependent Claim
11 words
The solution of claim 1 wherein the dispersant is silicon dioxide.
Claim 4
Dependent Claim
21 words
The solution of claim 1 wherein the ratio of polyvinyl acetate suspension to water by weight is between 1:5 and 1:8.
Claim 5
Dependent Claim
18 words
The solution of claim 3 further comprising an offset adjusting dye for use with a reflectance measurement system.
Claim 6
Dependent Claim
14 words
The solution of claim 4 further comprising 0.0075% copper phthalocyanine tetrasulfonic acid tetrasodium salt.
Claim 7
Dependent Claim
18 words
The solution of claim 3 further comprising polyvinyl acetate having a particle size between 0.5 and 10 microns.
Claim 8
Dependent Claim
54 words
A control solution for use with a porous reagent strip having about 0.8 micron diameter pore size, said solution mimicking whole blood on said strip, comprising: a 40%-55% polyvinyl acetate suspension and water in a ratio of between 1:5 and 1:8 by weight, a dispersant to maintain said polyvinyl acetate in suspension and glucose.
Claim 9
Dependent Claim
54 words
A control solution for use with a porous reagent strip having about 0.8 micron diameter pore size, said solution mimicking whole blood on said strip, comprising: a 40%-55% polyvinyl acetate suspension and water in a ratio of between 1:5 and 1:8 by weight, a dispersant to maintain said polyvinyl acetate in suspension and glucose.
Claim 10
Dependent Claim
17 words
The solution of claim 7 wherein the ratio of polyvinyl acetate suspension to water is about 1:6.
Claim 11
Dependent Claim
14 words
The solution of claim 8 further comprising 0.0075% copper phthalocyanine tetrasulfonic acid tetrasodium salt.
Claim 12
Dependent Claim
11 words
The solution of claim 8 wherein the dispersant is silicon dioxide.
Claim 13
Dependent Claim
23 words
The solution of claim 8 wherein the amount of solid polyvinyl acetate in the polymer suspension is between about 40% to about 55%.
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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) | 1996-02-16 | 1996-08-17 | 1997-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-16 | 2000-08-17 | 2001-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-16 | 2004-08-17 | 2005-02-16 | $7700.00 | Window Closed / Lapsed |