C07C 37/04
By substitution of so3h groups or a derivative thereof
Official title: by substitution of SO3H groups or a derivative thereof
C07C37/04 (By substitution of so3h groups or a derivative thereof) appears on 16 US grants and 2 published applications in this corpus.
Search patents in C07C- Granted patents
- 16
- Published applications
- 2
- Assignees
- 10
- Inventors
- 49
- Latest grant
- 9 Nov 1999
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 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 | 1 |
| 2010 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for the preparation of hydroxynapthalenes9 Nov 1999US 5,981,806 ABayer Aktiengesellschaft
- Process for the preparation of 4-hydroxybiphenyl8 Dec 1998US 5,847,234 ABayer Aktiengesellschaft
- Process of selective desulfonation21 Apr 1998US 5,741,954 AKemira Agro Oy
- Process for producing aromatic hydroxy compound21 Jun 1994US 5,322,946 AKawasaki Steel Corporation
- Preparation of 4,4"-dihydroxyterphenyl16 Apr 1991US 5,008,472 ABASF SE
Most cited
By later US patents
- Process for the manufacture of 4,4' dihydroxydiphenyl9US 4,243,822 ABuffalo Color Corporation · 1981
- Method for preparing .alpha.-naphthol7US 4,237,323 A1980
- Process for the preparation of 1,5-dihydroxynaphthalene and 1,5-diaminonaphthalene6US 4,973,758 ABayer Aktiengesellschaft · 1990
- Process for the preparation of alkali metal diphenylates and free hydroxydiphenyls5US 4,467,123 ABayer Aktiengesellschaft · 1984
- Thermally stable enyne polysulfone polymers4US 4,178,428 AThe United States of America as represented by the Secretary of the Air Force · 1979