C09B 1/08
Dyes containing only oh-groups
Official title: Dyes containing only OH-groups
C09B1/08 (Dyes containing only oh-groups) appears on 6 US grants and 2 published applications in this corpus.
Search patents in C09B- Granted patents
- 6
- Published applications
- 2
- Assignees
- 8
- Inventors
- 21
- Latest grant
- 1 Mar 2016
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 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 | 0 | 0 |
| 1989 | 0 | 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 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method of preparing a compound1 Mar 2016US 9,272,981 B1Amazon Technologies, Inc.
- Method for preparing alizarin derivative compound, novel alizarin derivative compound, surface modification method, photoelectric conversion film, photoelectric conversion element, and electrophotographic photoreceptor3 Jun 2014US 8,741,513 B2FUJIFILM Corporation
- Guest-host type liquid crystal composition25 Jun 1991US 5,026,505 AHitachi, Ltd.
- Process for the preparation of aromatic hydroxy compounds14 Apr 1987US 4,657,707 ACiba-Geigy Corporation
- Bis-quinizarin compounds2 Feb 1982US 4,313,887 AGulf Oil Corporation
- Anthraquinonic derivatives and their use as colouring agents7 Oct 2021US 2021/0309860 A1Pili
- Method for preparing alizarin derivative compound, novel alizarin derivative compound, surface modification method, photoelectric conversion film, photoelectric conversion element, and electrophotographic photoreceptor27 Sep 2012US 2012/0244462 A1FUJIFILM Corporation
Most cited
By later US patents
- Guest-host type liquid crystal composition8US 5,026,505 AHitachi, Ltd. · 1991
- Process for the preparation of aromatic hydroxy compounds1US 4,657,707 ACiba-Geigy Corporation · 1987
- Method for preparing alizarin derivative compound, novel alizarin derivative compound, surface modification method, photoelectric conversion film, photoelectric conversion element, and electrophotographic photoreceptor1US 8,741,513 B2FUJIFILM Corporation · 2014