C09B 43/38
By reacting two or more ortho-hydroxy naphthoic acid dyes with polyamines
Official title: by reacting two or more ortho-hydroxy naphthoic acid dyes with polyamines
C09B43/38 (By reacting two or more ortho-hydroxy naphthoic acid dyes with polyamines) appears on 12 US grants and 1 published applications in this corpus.
Search patents in C09B- Granted patents
- 12
- Published applications
- 1
- Assignees
- 6
- Inventors
- 16
- Latest grant
- 20 Aug 2002
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Preparation of disazo condensation pigments in microreactors20 Aug 2002US 6,437,104 B1Clariant GmbH
- Process for the preparation of highly coloured diazo pigment mixtures16 Mar 1999US 5,883,167 ACiba Specialty Chemicals Corporation
- (2,5-diisopropoxycarbonylbenzene-azo-2-hydroxy-3-carbamoyl naphthalene) pigment12 Jan 1988US 4,719,293 ACiba-Geigy Corporation
- Disazo pigment from condensation of carboxylic acid chloride with 2,5-dichloro-1,4-phenylene diamine25 Aug 1987US 4,689,403 ACiba-Geigy Corporation
- Bis-(1-substituted phenylazo-2-hydroxynaphthalene-3-carboxamido)naphthalenes28 Nov 1978US 4,127,567 ASandoz Ltd.
Most cited
By later US patents
- Preparation of disazo condensation pigments in microreactors20US 6,437,104 B1Clariant GmbH · 2002
- Monoazo and disazo compounds having optionally further substituted 2-acyl-, carboxy- or cyano-benzothienyl diazo component radicals6US 4,055,556 ASandoz Ltd. · 1977
- Disazo pigment from condensation of carboxylic acid chloride with 2,5-dichloro-1,4-phenylene diamine4US 4,689,403 ACiba-Geigy Corporation · 1987
- Azo pigments having two 2-halo-5-trifluoromethylphenyl diazo component radicals and a bis-(2-hydroxynaphthoyl-3-amino)-2,5-dihalobenzene coupling component radical3US 4,051,121 ASandoz Ltd. · 1977
- Disazo pigments containing ether substituted alkoxy carbonyl groups3US 4,053,464 ACiba-Geigy Corporation · 1977