G03G 15/0233
Structure, details of the charging member
Official title: {Structure, details of the charging member, e.g. chemical composition, surface properties}
G03G15/0233 (Structure, details of the charging member) appears on 882 US grants and 838 published applications in this corpus.
Search patents in G03G- Granted patents
- 882
- Published applications
- 838
- Assignees
- 111
- Inventors
- 1,409
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 8 | 0 |
| 1995 | 18 | 0 |
| 1996 | 19 | 0 |
| 1997 | 21 | 0 |
| 1998 | 24 | 0 |
| 1999 | 17 | 0 |
| 2000 | 21 | 0 |
| 2001 | 18 | 8 |
| 2002 | 18 | 24 |
| 2003 | 18 | 20 |
| 2004 | 10 | 20 |
| 2005 | 19 | 17 |
| 2006 | 12 | 24 |
| 2007 | 18 | 25 |
| 2008 | 10 | 26 |
| 2009 | 16 | 25 |
| 2010 | 25 | 31 |
| 2011 | 17 | 34 |
| 2012 | 30 | 59 |
| 2013 | 41 | 42 |
| 2014 | 43 | 47 |
| 2015 | 47 | 56 |
| 2016 | 45 | 40 |
| 2017 | 45 | 41 |
| 2018 | 47 | 53 |
| 2019 | 63 | 41 |
| 2020 | 42 | 35 |
| 2021 | 29 | 34 |
| 2022 | 29 | 27 |
| 2023 | 22 | 31 |
| 2024 | 28 | 29 |
| 2025 | 21 | 21 |
| 2026 | 19 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Charging roll22 Sep 2026US 12,743,037 B2Synztec Co., Ltd.
- Image forming apparatus15 Sep 2026US 12,736,891 B2KYOCERA Document Solutions Inc.
- Electrophotographic member, process cartridge, and electrophotographic image forming apparatus1 Sep 2026US 12,724,358 B2Canon Kabushiki Kaisha
- Image forming apparatus18 Aug 2026US 12,710,705 B2Canon Kabushiki Kaisha
- Charging member with resin-based surface layer containing conductive inorganic particles11 Aug 2026US 12,704,797 B2FUJIFILM Business Innovation Corp.
- Electrophotographic member, transfer device, charging device, and image forming apparatus17 Sep 2026US 2026/0277138 A1FUJIFILM Business Innovation Corp.
- Charging-member cleaner, image forming apparatus, and process cartridge10 Sep 2026US 2026/0267252 A1
- Electrophotographic image forming apparatus, process cartridge, and image forming method10 Sep 2026US 2026/0267253 A1Canon Kabushiki Kaisha
- Charging roller, process cartridge, and electrophotographic image forming apparatus10 Sep 2026US 2026/0267254 A1Canon Kabushiki Kaisha
- Image forming apparatus10 Sep 2026US 2026/0267255 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Electric contact member applying voltage to charger, process cartridge, and image forming apparatus119US 6,954,600 B2Canon Kabushiki Kaisha · 2005
- Apparatus for forming an electrophotographic latent image74US 4,967,231 AElectric Co., Ltd. · 1990
- Image forming apparatus having weighting material in image bearing member and process cartridge usable with same62US 5,430,526 ACanon Kabushiki Kaisha · 1995
- Charging device with contactable charging means and an image forming apparatus having the charging means and a detachable process unit53US 5,126,913 ACanon Kabushiki Kaisha · 1992
- Charging member52US 5,089,851 ACanon Kabushiki Kaisha · 1992