C09B 31/065
Containing acid groups
Official title: containing acid groups, e.g. —CO2H, —SO3H, —PO3H2, —OSO3H, —OPO2H2; Salts thereof
C09B31/065 (Containing acid groups) appears on 23 US grants and 1 published applications in this corpus.
Search patents in C09B- Granted patents
- 23
- Published applications
- 1
- Assignees
- 13
- Inventors
- 34
- Latest grant
- 22 Jul 1997
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Azo dyes, processes for their preparation and their use22 Jul 1997US 5,650,497 ACiba-Geigy Corporation
- Biodegradable azo dyes23 Jan 1996US 5,486,214 AIdaho Research Foundation, Inc.
- Azo dyestuffs possessing antimicrobial properties4 Oct 1983US 4,407,748 ATsentralny Nauchno-Issledovatelsky Institut
- Disazo compounds having a sulfo group-containing diazo component radical, a 1,4-phenylene middle component radical having a substituted amino group and a coupling component radical having a free, acylated or etherified hydroxy group24 May 1983US 4,384,870 ASandoz Ltd.
- Water-soluble tris phenyl bisazo dyes for polyamide fibers22 Feb 1983US 4,374,769 AEastman Kodak Company
Most cited
By later US patents
- Yellow disazo acid dye solution15US 3,963,418 AE. I. Du Pont de Nemours and Company · 1976
- Storage-stable concentrated aqueous solution of disazo acid dye12US 3,986,827 AE. I. Du Pont de Nemours and Company · 1976
- Sulfonated disazo dyestuffs containing an ether group9US 3,932,378 ACiba-Geigy Corporation · 1976
- Biodegradable azo dyes9US 5,486,214 AIdaho Research Foundation, Inc. · 1996
- Sulfo phenyl-azo-sulro phenyl-azo-alkoxy-diphenyl compounds7US 3,932,376 ACrompton & Knowles Corporation · 1976