Patent US4394512A successfully refreshed from Google Patents.
US4394512A
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1-(Substituted phenyl) aminoantipyrin compounds
Assignee: Roche Diagnostics GmbH
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Filing: 1981-01-23
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Granted: 1983-07-19
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Expires: 2001-01-23
Abstract
Abstract Compounds of the general formula ##STR1## wherein R represents an alkyl group of 1 to 3 carbon atoms or the group N(R 2 ) 2 , in which R 2 represents a hydrogen atom, an alkyl group of 1 to 3 carbon atoms, or an acyl group of 1 to 3 carbon atoms, and R 1 has the same meaning as R or is a hydrogen atom, are new and are suitable as chromogens for measuring H 2 O 2 formation in enzymatic reactions.
Inventors
- 👤 Hans-Georg Batz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:55
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/18; C07D231/20; C07D231/22; C07D231/26; C07D231/44; C07D231/46; C12; C12Q; C12Q1/00; C12Q1/26; C12Q1/28; C12Q2326/00; C12Q2326/50; C12Q2326/90; C12Q2326/96; Y; Y10; Y10S; Y10S436/00; Y10S436/904; Y10T; Y10T436/00; Y10T436/20; Y10T436/206664
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A compound of the formula ##STR10## wherein R represents the group N(R 2 ) 2 , in which each R 2 is an alkyl group of 1 to 3 carbon atoms, or one R 2 is an acyl group of 1 to 3 and the other R 2 is an alkyl group of 1 to 3 carbon atoms, and R 1 has the same meaning as R or is a hydrogen atom or NH 2 .
Claim 2
Dependent Claim
76 words
A compound of the formula ##STR10## wherein R represents the group N(R 2 ) 2 , in which each R 2 is an alkyl group of 1 to 3 carbon atoms, or one R 2 is an acyl group of 1 to 3 and the other R 2 is an alkyl group of 1 to 3 carbon atoms, and R 1 has the same meaning as R or is a hydrogen atom or NH 2 .
Claim 3
Dependent Claim
11 words
Compound of claim 1, wherein R=NH 2 and R 1 =H.
Claim 4
Dependent Claim
25 words
Compound of claim 1 wherein R is N(R 2 ) 2 in which R 2 is an alkyl group of 1 to 3 carbon atoms.
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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |