US4297502A
Expired / Lapsed
US
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Aromatic bisazomethines, a method for their preparation, and their use as reactive pigments
Assignee: Dynamit Nobel AG
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Filing: 1980-06-19
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Granted: 1981-10-27
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Expires: 2000-06-19
Abstract
Abstract An aromatic bisazomethine prepared from the disubstituted benzidines and aromatic aldehydes, characterized by the general formula ##STR1## wherein each R=COOCH 3 , COOC 2 H 5 , COOH, CH 2 Cl, CHCl 2 , CH 2 Br, CCl 3 , Cl or Br and each R'=Cl, OCH 3 or CH 3 .
Inventors
- 👤 Hans-Joachim Herrmann
- 👤 Gunther Meyer
- 👤 Klaus-Dieter Steffen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:54
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/78; C09B55/00; C09B55/005; C09B55/007
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
51 words
An aromatic bisazomethine prepared from disubstituted benzidines and aromatic aldehydes, characterized by the general formula ##STR14## wherein each R=COOCH 3 , COOC 2 H 5 , COOH, CH 2 Cl, CHCl 2 , CH 2 Br, CCl 3 , Cl or Br and each R'=Cl, OCH 3 or CH 3 .
Claim 2
Dependent Claim
51 words
An aromatic bisazomethine prepared from disubstituted benzidines and aromatic aldehydes, characterized by the general formula ##STR14## wherein each R=COOCH 3 , COOC 2 H 5 , COOH, CH 2 Cl, CHCl 2 , CH 2 Br, CCl 3 , Cl or Br and each R'=Cl, OCH 3 or CH 3 .
Claim 3
Dependent Claim
20 words
An aromatic bisazomethine according to claim 1, wherein at least one R is CH 2 Cl or CHCl 2 .
Claim 4
Dependent Claim
14 words
An aromatic bisazomethine according to claim 1, wherein at least one R' is chlorine.
Claim 5
Dependent Claim
13 words
A bisazomethine according to claim 1, wherein at least one R' is methoxy.
Claim 6
Dependent Claim
14 words
A bisazomethine according to claim 1, wherein at least one R moiety is carboxyl.
Claim 7
Dependent Claim
17 words
An aromatic bisazomethine according to claim 1, wherein at least one R moiety is COOCH 3 .
Claim 8
Dependent Claim
11 words
An aromatic bisazomethine according to claim 1, of the formula ##STR15##
Claim 9
Dependent Claim
11 words
An aromatic bisazomethine according to claim 1 of the formula ##STR16##
Claim 10
Dependent Claim
10 words
A bisazomethine according to claim 1, of the formula ##STR17##
Claim 11
Dependent Claim
10 words
A bisazomethine according to claim 1, of the formula ##STR18##
Claim 12
Dependent Claim
10 words
A bisazomethine according to claim 1, of the formula ##STR19##
Claim 13
Dependent Claim
10 words
A bisazomethine according to claim 1, of the formula ##STR20##
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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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |