US4251223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitizers for peroxidative activity tests
Assignee: Bayer Corp
•
Filing: 1979-12-17
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Granted: 1981-02-17
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Expires: 1999-12-17
Abstract
Abstract Improved test compositions, devices and methods for the detecting of peroxidatively active substances are provided. The test compositions include an indicator capable of being oxidized in the presence of peroxidatively active substances to provide a color change, an oxidized agent effective to oxidize said indicator, and a sensitizing agent. The sensitizing agent comprises 4-azafluorene.
Inventors
- 👤 William I. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:26
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/72; G01N33/721; G01N33/725; C; C12; C12Q; C12Q1/00; C12Q1/26; C12Q1/28; Y; Y10; Y10S; Y10S436/00; Y10S436/904
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
43 words
A test composition for detection of peroxidatively active substances comprising an indicator capable of being oxidized in the presence of a peroxidatively active substance to provide a color change, an oxidizing agent effective to oxidize said indicator, and 4-azafluorene as a sensitizing agent.
Claim 2
Dependent Claim
43 words
A test composition for detection of peroxidatively active substances comprising an indicator capable of being oxidized in the presence of a peroxidatively active substance to provide a color change, an oxidizing agent effective to oxidize said indicator, and 4-azafluorene as a sensitizing agent.
Claim 3
Dependent Claim
20 words
A test device for detection of peroxidatively active substances which comprises a carrier incorporated with the composition of claim 1.
Claim 4
Dependent Claim
24 words
A process for preparing a device for the determination of peroxidatively active substances which comprises incorporating a carrier with the composition of claim 1.
Claim 5
Dependent Claim
26 words
A method for the determination of peroxidatively active substances which comprises contacting said sample with the composition of claim 1 and observing any resultant color change.
References Cited (Backward Citations)
US3853472A
Cited
US3917452A
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US3975161A
Cited
US3986833A
Cited
US4063894A
Cited
US4148611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |