G03G 15/0216
By bringing a charging member into contact with the member to be
Official title: {by bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers}
G03G15/0216 (By bringing a charging member into contact with the member to be) appears on 1,576 US grants and 1,391 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,576
- Published applications
- 1,391
- Assignees
- 146
- Inventors
- 2,344
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 13 | 0 |
| 1993 | 14 | 0 |
| 1994 | 21 | 0 |
| 1995 | 39 | 0 |
| 1996 | 50 | 0 |
| 1997 | 47 | 0 |
| 1998 | 46 | 0 |
| 1999 | 33 | 0 |
| 2000 | 39 | 0 |
| 2001 | 30 | 17 |
| 2002 | 34 | 46 |
| 2003 | 40 | 45 |
| 2004 | 33 | 35 |
| 2005 | 33 | 25 |
| 2006 | 23 | 36 |
| 2007 | 26 | 60 |
| 2008 | 20 | 57 |
| 2009 | 37 | 42 |
| 2010 | 51 | 47 |
| 2011 | 42 | 58 |
| 2012 | 48 | 71 |
| 2013 | 59 | 57 |
| 2014 | 64 | 58 |
| 2015 | 63 | 70 |
| 2016 | 61 | 62 |
| 2017 | 68 | 73 |
| 2018 | 74 | 94 |
| 2019 | 109 | 76 |
| 2020 | 76 | 66 |
| 2021 | 50 | 51 |
| 2022 | 46 | 47 |
| 2023 | 36 | 51 |
| 2024 | 43 | 61 |
| 2025 | 47 | 46 |
| 2026 | 30 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Charging roll22 Sep 2026US 12,743,037 B2Synztec Co., Ltd.
- Image-forming apparatus generating electrical discharge upstream of transfer portion22 Sep 2026US 12,743,041 B2Canon Kabushiki Kaisha
- Image forming apparatus15 Sep 2026US 12,736,891 B2KYOCERA Document Solutions Inc.
- Recording material estimation method, information processing apparatus, and consumable8 Sep 2026US 12,730,404 B2Zhuhai Pantum Electronics Co., Ltd.
- Electrophotographic member, process cartridge, and electrophotographic image forming apparatus1 Sep 2026US 12,724,358 B2Canon Kabushiki Kaisha
- Electrophotographic member, transfer device, charging device, and image forming apparatus17 Sep 2026US 2026/0277138 A1FUJIFILM Business Innovation Corp.
- Electrophotographic photoreceptor, process cartridge, and image forming apparatus10 Sep 2026US 2026/0267244 A1KYOCERA Document Solutions Inc.
- 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
Most cited
By later US patents
- Image forming apparatus with a contact member contacting an image carrier301US 5,585,896 ARicoh Company, Ltd. · 1996
- Charging device135US 4,851,960 ACanon Kabushiki Kaisha · 1989
- Image forming apparatus rotationally driving image bearing member and contact electrifying member of process cartridge and process cartridge comprising image bearing member and contact electrifying member120US 6,714,746 B2Canon Kabushiki Kaisha · 2004
- Electric contact member applying voltage to charger, process cartridge, and image forming apparatus119US 6,954,600 B2Canon Kabushiki Kaisha · 2005
- Copier with retractable charging unit to prevent damage to drum when removing process cartridge104US 5,095,335 ACanon Kabushiki Kaisha · 1992