C09B 35/233
The tetrazo component being a derivative of a diaryl ketone or benzil
Official title: the tetrazo component being a derivative of a diaryl ketone or benzil
C09B35/233 (The tetrazo component being a derivative of a diaryl ketone or benzil) appears on 7 US grants and 2 published applications in this corpus.
Search patents in C09B- Granted patents
- 7
- Published applications
- 2
- Assignees
- 2
- Inventors
- 12
- Latest grant
- 13 Feb 2007
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 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 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Electrophotographic photoconductor, process for forming an image, image forming apparatus and process cartridge for the same13 Feb 2007US 7,175,958 B2Ricoh Company, Ltd.
- Electrophotographic photoconductor, process for forming an image, image forming apparatus and a process cartridge for the same1 Feb 2005US 6,849,367 B2Ricoh Company, Ltd.
- Electrophotographic photoreceptor having a bisazo photoreceptive layer10 Nov 1992US 5,162,181 AKonica Corporation
- Photoreceptor for electrophotography1 May 1990US 4,921,770 A
- Photosensitive material containing disazo compound for use in electrophotography24 Nov 1987US 4,708,921 ARicoh Company, Ltd.
- Electrophotographic photoconductor, process for forming an image, image forming apparatus and process cartridge for the same26 May 2005US 2005/0112487 A1Ricoh Company, Ltd.
- Electrophotographic photoconductor, process for forming an image, image forming apparatus and a process cartridge for the same9 Oct 2003US 2003/0190540 A1Ricoh Company, Ltd.
Most cited
By later US patents
- Electrophotographic printing original plate and electrophotographic plate making process using the printing original plate25US 4,596,754 ARicoh Company, Ltd. · 1986
- Electrophotographic photoconductor, process for forming an image, image forming apparatus and a process cartridge for the same16US 6,849,367 B2Ricoh Company, Ltd. · 2005
- Tetrazonium salt compound, disazo compound, method for preparing the same, and photosensitive material containing said disazo compound for use in electrophotography13US 4,619,878 ARicoh Company, Ltd. · 1986
- Electrophotographic photoconductor, process for forming an image, image forming apparatus and process cartridge for the same11US 7,175,958 B2Ricoh Company, Ltd. · 2007
- Photoreceptor for electrophotography9US 4,921,770 A1990