Patent US4473079A successfully refreshed from Google Patents.
US4473079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simple, small, self-contained tests for occult blood
Assignee: Individual
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Filing: 1982-09-13
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Granted: 1984-09-25
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Expires: 2002-09-13
Abstract
Abstract A test for occult blood comprises an indicator that registers a chromatic change in the presence of heme and an oxygen-releasing compound, the indicator being carried on a support; a solid oxygen-releasing compound dispersed in a spreadable base and applicator to sample biological material and apply the biological material sample along with the base material-dispersed compound to the support. A chromatic change on the support indicates the presence of occult blood. An examining glove may carry the support at one location and the base material-dispersed compound at another location while a finger of the examining glove may be used as the applicator.
Inventors
- 👤 David A. Jasper
- 👤 Hugh J. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:00
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/26; C12Q1/28; A; A61; A61B; A61B10/00; A61B10/0038; A61B42/00; A61B42/10; A61B2010/0003; A61B2010/0006
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
A device for testing for occult blood, comprising an examining glove, an indicator that registers a chromatic change in the presence of heme and an oxygen-releasing compound, a support on the surface of said glove carrying said indicator, said support having a surface on which a chromatic change may be noted, a solid oxygen-releasing compound that effects said chromatic change in the presence of heme and said indicator, and a spreadable base material in which said solid compound is dispersed, said base material being carried on the surface of said glove at a location remote from said indicator, whereby a biological substance may be sampled with a finger of said glove and transferred along with said base material-dispersed solid compound to said support, development of a color change on said support indicating the presence of occult blood.
Claim 2
Independent Claim
137 words
A device for testing for occult blood, comprising an examining glove, an indicator that registers a chromatic change in the presence of heme and an oxygen-releasing compound, a support on the surface of said glove carrying said indicator, said support having a surface on which a chromatic change may be noted, a solid oxygen-releasing compound that effects said chromatic change in the presence of heme and said indicator, and a spreadable base material in which said solid compound is dispersed, said base material being carried on the surface of said glove at a location remote from said indicator, whereby a biological substance may be sampled with a finger of said glove and transferred along with said base material-dispersed solid compound to said support, development of a color change on said support indicating the presence of occult blood.
Claim 3
Dependent Claim
20 words
A device according to claim 1 having removable cover means over said base material-dispersed solid compound and said indicator-carrying support.
Claim 4
Dependent Claim
21 words
A device according to claim 1 wherein said indicator is selected from a group consisting of gum guaiac, benzidine and toluidine.
Claim 5
Dependent Claim
14 words
A device according to claim 1 wherein said oxygen-releasing compound contains a peroxide group.
Claim 6
Dependent Claim
21 words
The device of claim 1 further including a removable means for covering said compound and said indicator to prevent degradation thereof.
Claim 7
Dependent Claim
28 words
The device according to claim 1 wherein said solid oxygen releasing compound is selected from the group consisting of benzoyl peroxide, sodium peroxide, magnesium peroxide and sodium perborate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |