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Patent US4675160A successfully refreshed from Google Patents.
US4675160A
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Occult blood test monitor
Assignee: Warner Lambert Co LLC
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Filing: 1986-01-28
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Granted: 1987-06-23
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Expires: 2006-01-28
Abstract
Abstract An in-the-bowl occult blood test is provided with a flushable matrix having a separate testing site which will indicate the presence of residual oxidizing compounds in the toilet.
Inventors
- 👤 Joseph M. Talmage
- 👤 Norman H. Oksman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:20
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/72; G01N33/721; G01N33/726; G01N33/725; Y; Y10; Y10S; Y10S436/00; Y10S436/904
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
An in-bowl testing matrix in the form of a flushable, porous, cellulosic sheet, for determining the presence of occult blood in a stool sample comprising in combination; (a) means for testing a stool sample which includes a substrate containing thereon an oxygen sensitive dye and a peroxygen source capable of reacting with each other in the presence of occult blood to produce an indication of the presence of occult blood; and (b) a toilet contaminant monitor testing means consisting essentially of a substrate having thereon an oxygen sensitive dye reactable with strong oxidizing agents present as contaminants in a solution to produce an indication of the presence of such strong oxidizing agents.
Claim 2
Dependent Claim
112 words
An in-bowl testing matrix in the form of a flushable, porous, cellulosic sheet, for determining the presence of occult blood in a stool sample comprising in combination; (a) means for testing a stool sample which includes a substrate containing thereon an oxygen sensitive dye and a peroxygen source capable of reacting with each other in the presence of occult blood to produce an indication of the presence of occult blood; and (b) a toilet contaminant monitor testing means consisting essentially of a substrate having thereon an oxygen sensitive dye reactable with strong oxidizing agents present as contaminants in a solution to produce an indication of the presence of such strong oxidizing agents.
Claim 3
Dependent Claim
33 words
The matrix of claim 1 further containing a contaminant monitor means cooperatively associated therewith for testing the efficacy of the oxygen sensitive dye and peroxygen source present on the stool sample testing means.
Claim 4
Dependent Claim
42 words
The matrix of claim 1 wherein the oxygen sensitive dye of (a) and/or (b) is selected from the group consisting of guaiac, guaiac derivatives, aniline, aniline derivatives, o-tolidine, o-toluidine, p-toluidine, benzidine, tetramethylbenzidine, di-anisidine, o-cresol, m-cresol, alphanaphthol, catechol, guaicol, pyrogallol and mixtures thereof.
Claim 5
Dependent Claim
17 words
The matrix of claim 1 wherein the oxygen sensitive dye of (a) and/or (b) is gum guaiac.
Claim 6
Dependent Claim
24 words
The matrix of claim 4 wherein gum guaiac is buffered to a pH of 2 and 6 prior to its application to the matrix.
Claim 7
Dependent Claim
26 words
The matrix of claim 1 wherein the peroxygen source is selected from the group consisting of compositions which yield hydrogen peroxide in the presence of water.
Claim 8
Dependent Claim
13 words
The matrix of claim 6 wherein the peroxygen source is a monopersulfate salt.
Claim 9
Dependent Claim
22 words
The matrix of claim 7 wherein the monopersulfate salt is adhered to the substrate of the stool sample testing means with polyvinylpyrrolidone.
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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) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |