C09B 1/04
Preparation by synthesis of the nucleus
C09B1/04 (Preparation by synthesis of the nucleus) appears on 4 US grants and 0 published applications in this corpus.
Search patents in C09B- Granted patents
- 4
- Published applications
- 0
- Assignees
- 4
- Inventors
- 6
- Latest grant
- 13 Jun 1995
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 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 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Synthesis of carminic acid and principal intermediates13 Jun 1995US 5,424,421 AEuropean Colour PLC
- Process for the production of quinizarine derivatives which are disubstituted in the 5- and 8-positions by hydroxyl or chlorine24 Feb 1987US 4,645,626 ACiba-Geigy Corporation
- Process for the preparation of quinizarin7 Jun 1983US 4,387,054 ABayer Aktiengesellschaft
- Preparation of hydroxyanthraquinones29 Sep 1981US 4,292,248 AAmerican Color & Chemical Corporation
No published applications in this class yet.
Most cited
By later US patents