C09B 3/04
Preparation by synthesis of the nucleus
C09B3/04 (Preparation by synthesis of the nucleus) appears on 9 US grants and 1 published applications in this corpus.
Search patents in C09B- Granted patents
- 9
- Published applications
- 1
- Assignees
- 6
- Inventors
- 19
- Latest grant
- 30 Mar 2004
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 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 | 1 |
| 2004 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Thloxanthone dyes with improved solubility and a method of preparing 2-oxybenzanthrones as intermediate materials for making of these dyes30 Mar 2004US 6,713,636 B23M Innovative Properties Company
- Dicyanobenzanthrone compounds12 Feb 1991US 4,992,569 ACiba-Geigy Corporation
- Dicyanobenzanthrone compounds31 Jan 1989US 4,801,406 ACiba-Geigy Corporation
- Process for the production of benzanthrone17 Dec 1985US 4,559,176 ACiba-Geigy Corporation
- Process for producing 2-methoxybenzanthrones8 Nov 1983US 4,414,156 ACiba-Geigy Corporation
Most cited
By later US patents
- Method for the preparation of 2-hydroxybenzanthrone compounds8US 4,036,859 AMontedison Fibre S.p.A. · 1977
- Electrochemical process for the production of benzanthrone6US 4,311,565 ACiba-Geigy Corporation · 1982
- Process for producing benzanthrone4US 4,127,595 AKawasaki Kasei Chemicals Ltd. · 1978
- Process for the preparation of benzanthrones4US 4,296,043 ABayer Aktiengesellschaft · 1981
- Dicyanobenzanthrone compounds2US 4,801,406 ACiba-Geigy Corporation · 1989