G03G 5/0661
In different ring systems, each system containing at least one hetero ring
Official title: {in different ring systems, each system containing at least one hetero ring}
G03G5/0661 (In different ring systems, each system containing at least one hetero ring) appears on 251 US grants and 81 published applications in this corpus.
Search patents in G03G- Granted patents
- 251
- Published applications
- 81
- Assignees
- 65
- Inventors
- 419
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 12 | 0 |
| 1984 | 13 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 8 | 0 |
| 1989 | 12 | 0 |
| 1990 | 14 | 0 |
| 1991 | 10 | 0 |
| 1992 | 20 | 0 |
| 1993 | 3 | 0 |
| 1994 | 17 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 7 | 0 |
| 2002 | 3 | 2 |
| 2003 | 2 | 10 |
| 2004 | 8 | 9 |
| 2005 | 5 | 9 |
| 2006 | 6 | 9 |
| 2007 | 7 | 6 |
| 2008 | 8 | 3 |
| 2009 | 2 | 4 |
| 2010 | 5 | 1 |
| 2011 | 4 | 3 |
| 2012 | 4 | 3 |
| 2013 | 3 | 4 |
| 2014 | 3 | 2 |
| 2015 | 1 | 2 |
| 2016 | 1 | 0 |
| 2017 | 1 | 3 |
| 2018 | 2 | 1 |
| 2019 | 3 | 4 |
| 2020 | 2 | 2 |
| 2021 | 2 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Electrophotographic apparatus and process cartridge10 Feb 2026US 12,547,087 B2Canon Kabushiki Kaisha
- Benzimidazo[1,2-a]benzimidazole derivatives for electronic applications29 Aug 2023US 11,744,152 B2UDC Ireland Limited
- Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus13 Jul 2021US 11,061,341 B2Canon Kabushiki Kaisha
- Electrophotographic photoreceptor, process cartridge, image forming apparatus, and imide compound12 Jan 2021US 10,890,854 B2Fuji Xerox Co., Ltd.
- Electrophotographic photoreceptor, method of producing an electrophotographic photoreceptor, process cartridge, and image forming apparatus10 Sep 2026US 2026/0267246 A1KYOCERA Document Solutions Inc.
- Conductive substrate for electrophotographic photoreceptor, electrophotographic photoreceptor, process cartridge, image forming apparatus, and method for manufacturing conductive substrate for electrophotographic photoreceptor28 Aug 2025US 2025/0271808 A1FUJIFILM Business Innovation Corp.
- Electrophotographic apparatus and process cartridge1 May 2025US 2025/0138442 A1Canon Kabushiki Kaisha
- Benzimidazo[1,2-a]Benzimidazole Derivatives for Electronic Applications18 Mar 2021US 2021/0083200 A1UDC Ireland Limited
- Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus6 Feb 2020US 2020/0041918 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Electrophotographic element with carbazole hydrazone or anile charge transport compounds130US 4,297,426 ARicoh Company, Ltd. · 1981
- Organophotoreceptors for electrophotography featuring novel charge transport compounds73US 6,140,004 AImation Corp. · 2000
- Organophotoreceptors for electrophotography featuring novel charge transport compounds72US 6,066,426 AImation Corp. · 2000
- Organophotoreceptors for electrophotography featuring novel charge transport compounds based upon hydroxy-functional compounds65US 6,214,503 B1Imation Corp. · 2001
- Squarylium dye and diane blue dye charge generating layer mixture for electrophotographic light sensitive elements and processes64US 4,353,971 APitney Bowes Inc. · 1982