C09B 5/04
Pyrazolanthrones
C09B5/04 (Pyrazolanthrones) appears on 7 US grants and 0 published applications in this corpus.
Search patents in C09B- Granted patents
- 7
- Published applications
- 0
- Assignees
- 6
- Inventors
- 11
- Latest grant
- 21 Jan 2003
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 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 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Color filter and liquid crystal display device having the same21 Jan 2003US 6,509,125 B1Toppan Printing Co., Ltd.
- Process for the preparation of a n-alkylated bipyrazoleanthrone9 Jan 1990US 4,892,957 ACiba-Geigy Corporation
- Process for the preparation of anthraquinoid intermediates and vat dyes15 Nov 1988US 4,784,805 ACiba-Geiby Corporation
- Method and apparatus for displaying indications of instructions in previously recorded messages30 Jun 1987US 4,677,501 ADictaphone Corporation
- Process for the preparation of triazinylamino-anthraquinones8 Jun 1982US 4,334,068 ABayer Aktiengesellschaft
No published applications in this class yet.
Most cited
By later US patents
- Method and apparatus for displaying indications of instructions in previously recorded messages63US 4,677,501 ADictaphone Corporation · 1987
- Color filter and liquid crystal display device having the same35US 6,509,125 B1Toppan Printing Co., Ltd. · 2003
- Copolymers of dyes and acrylamide16US 4,132,841 AProduits Chimiques Ugine Kuhlmann · 1979
- Copolymers of anthraquinone dyes and acrylamide4US 4,093,793 AProduits Chimiques Ugine Kuhlmann · 1978
- Process for the preparation of anthraquinoid intermediates and vat dyes4US 4,784,805 ACiba-Geiby Corporation · 1988