C09B 44/005
Special process features in the quaternization reaction
Official title: {Special process features in the quaternization reaction}
C09B44/005 (Special process features in the quaternization reaction) appears on 15 US grants and 1 published applications in this corpus.
Search patents in C09B- Granted patents
- 15
- Published applications
- 1
- Assignees
- 10
- Inventors
- 26
- Latest grant
- 14 Sep 2010
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 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 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Tricationic dyes14 Sep 2010US 7,794,509 B2Ciba Corporation
- Preparation of quaternized azo dyes23 Nov 1993US 5,264,560 ABASF SE
- Process for the preparation of chlorozincate salts of benzo thiazolium azo dyestuffs by alkylating with dialkylsulfate in aqueous medium in the presence of Zn-containing acid acceptor at pH.ltoreq.720 Jan 1987US 4,638,053 AHoechstaktiengesellschaft
- Process for the preparation of cationic dyestuffs14 Sep 1982US 4,349,670 ABayer Aktiengesellschaft
- Process for the preparation of cationic dyestuffs10 Aug 1982US 4,343,936 ABayer Aktiengesellschaft
Most cited
By later US patents
- Tricationic dyes12US 7,794,509 B2Ciba Corporation · 2010
- Process for the production of concentrated solutions of cationic azo dyes9US 3,956,271 ASandoz Ltd. · 1976
- Method of producing quaternary pyridinium compounds8US 3,997,519 AGAF Corporation · 1976
- Process for the preparation of chlorozincate salts of benzo thiazolium azo dyestuffs by alkylating with dialkylsulfate in aqueous medium in the presence of Zn-containing acid acceptor at pH.ltoreq.77US 4,638,053 AHoechstaktiengesellschaft · 1987
- Process for the manufacture of cationic hydrazone dyes6US 4,026,885 ACiba-Geigy Corporation · 1977