US4396714A
Expired / Lapsed
US
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N-Sulfoalkylaniline derivatives
Assignee: Dojindo Laboratory and Co Ltd
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Filing: 1981-06-29
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Granted: 1983-08-02
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Expires: 2001-06-29
Abstract
Abstract N-sulfoalkylaniline derivatives in which at least one sulfoalkyl of 2 to 4 carbon atoms is attached to the nitrogen atom which are useful as dyestuff forming substances, a composition for determining the presence of peroxides using such compounds and the process for determination of peroxides using such compounds.
Inventors
- 👤 Masanobu Maeda
- 👤 Yuko Murao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:46
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/26; C12Q1/28; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; C12Q2326/00; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/142222; Y10T436/143333; Y10T436/144444; Y10T436/145555; Y10T436/147777; Y10T436/148888; Y10T436/20; Y10T436/206664
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
A composition for determing the presence of peroxides, comprising a crystalline compound of the formula (I): ##STR5## wherein R 1 is selected from the group consisting of hydrogen, lower alkyl and sulfoalkyl of 2-4 carbon atoms; R 2 is sulfoalkyl of 2-4 carbon atoms; R 3 is selected from the group consisting of hydrogen, hydroxy and lower alkyl and lower alkoxy; and R 4 is selected from the group consisting of hydrogen, lower alkoxy and lower alkyl, or the alkali metal or alkaline earth metal salt thereof, and a color-developer substance that will react with hydrogen peroxide selected from the groups consisting of 4-aminoantipyrine and 3-methyl-benzothiazolinonehydrazone and a said compound to form a dyestuff in the presence of peroxidase or a transition metal.
Claim 2
Dependent Claim
123 words
A composition for determing the presence of peroxides, comprising a crystalline compound of the formula (I): ##STR5## wherein R 1 is selected from the group consisting of hydrogen, lower alkyl and sulfoalkyl of 2-4 carbon atoms; R 2 is sulfoalkyl of 2-4 carbon atoms; R 3 is selected from the group consisting of hydrogen, hydroxy and lower alkyl and lower alkoxy; and R 4 is selected from the group consisting of hydrogen, lower alkoxy and lower alkyl, or the alkali metal or alkaline earth metal salt thereof, and a color-developer substance that will react with hydrogen peroxide selected from the groups consisting of 4-aminoantipyrine and 3-methyl-benzothiazolinonehydrazone and a said compound to form a dyestuff in the presence of peroxidase or a transition metal.
Claim 3
Dependent Claim
19 words
A composition according to claim 1 wherein the compound of the formula (I) is the calcium salt of N-ethyl-N-sulfopropyl-3-methylaniline.
Claim 4
Dependent Claim
19 words
A composition according to claim 1 wherein the compound of the formula (I) is the calcium salt of N-ethyl-N-sulfopropylaniline.
Claim 5
Dependent Claim
19 words
A composition according to claim 1 wherein the compound of the formula (I) is the sodium salt of N-sulfopropyl-2-methoxyaniline.
Claim 6
Dependent Claim
136 words
A process for determination of peroxides, which comprises adding to a sample containing an unknown quantity of a material capable of liberating peroxide upon peroxidation, a crystalline compound of the formula (I): ##STR6## wherein R 1 is selected from the group consisting of hydrogen, lower alkyl and sulfoalkyl of 2-4 carbon atoms; R 2 is sulfoalkyl of 2-4 carbon atoms; R 3 is selected from the group consisting of hydrogen, hydroxy and lower alkyl and lower alkoxy; and R 4 is selected from the group consisting of hydrogen, lower alkoxy and lower alkyl, or the alkali metal or alkaline earth metal salt thereof, a color-developer substance that will react in an oxidative-condensation with said compound to form a dyestuff and a peroxidase or a transition metal, and measuring the absorbency of the solution at maximum absorption.
Claim 7
Dependent Claim
136 words
A process for determination of peroxides, which comprises adding to a sample containing an unknown quantity of a material capable of liberating peroxide upon peroxidation, a crystalline compound of the formula (I): ##STR6## wherein R 1 is selected from the group consisting of hydrogen, lower alkyl and sulfoalkyl of 2-4 carbon atoms; R 2 is sulfoalkyl of 2-4 carbon atoms; R 3 is selected from the group consisting of hydrogen, hydroxy and lower alkyl and lower alkoxy; and R 4 is selected from the group consisting of hydrogen, lower alkoxy and lower alkyl, or the alkali metal or alkaline earth metal salt thereof, a color-developer substance that will react in an oxidative-condensation with said compound to form a dyestuff and a peroxidase or a transition metal, and measuring the absorbency of the solution at maximum absorption.
Claim 8
Dependent Claim
14 words
The process according to claim 5, wherein said color developer is 4-aminoantipyrine or 3-methylbenzothiazolinonehydrazone.
Claim 9
Dependent Claim
19 words
A process according to claim 5 wherein the compound of the formula (I) is the calcium salt of N-ethyl-N-sulfopropyl-3-methylaniline.
Claim 10
Dependent Claim
19 words
A process according to claim 5 wherein the compound of the formula (I) is the calcium salt of N-ethyl-N-sulfopropylaniline.
Claim 11
Dependent Claim
19 words
A process according to claim 5 wherein the compound of the formula (I) is the sodium salt of N-sulfopropyl-2-methoxyaniline.
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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) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |