G03G 2221/0047
Type of cleaning device
G03G2221/0047 (Type of cleaning device) appears on 63 US grants and 52 published applications in this corpus.
Search patents in G03G- Granted patents
- 63
- Published applications
- 52
- Assignees
- 21
- Inventors
- 138
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 4 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 3 |
| 2006 | 2 | 1 |
| 2007 | 3 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 2 |
| 2012 | 1 | 3 |
| 2013 | 3 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 3 | 2 |
| 2017 | 1 | 1 |
| 2018 | 1 | 2 |
| 2019 | 1 | 0 |
| 2020 | 0 | 5 |
| 2021 | 6 | 6 |
| 2022 | 5 | 2 |
| 2023 | 3 | 8 |
| 2024 | 7 | 5 |
| 2025 | 1 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Image forming apparatus including cleaning portion that performs cleaning of sensing surface of sensor for outputting sensing value related to toner density5 May 2026US 12,619,184 B2KYOCERA Document Solutions Inc.
- Developing cartridge having a sheet member provided at end portion of a developing roller17 Feb 2026US 12,554,214 B2Canon Kabushiki Kaisha
- Image forming apparatus25 Mar 2025US 12,259,677 B2Canon Kabushiki Kaisha
- Image forming apparatus24 Dec 2024US 12,172,863 B2KYOCERA Document Solutions Inc.
- Foreign substance collection apparatus, process cartridge, and image forming apparatus22 Oct 2024US 12,124,205 B2Canon Kabushiki Kaisha
- Process unit and image forming apparatus9 Apr 2026US 2026/0099109 A1Canon Kabushiki Kaisha
- Image forming apparatus17 Jul 2025US 2025/0231514 A1KYOCERA Document Solutions Inc.
- Foreign substance collection apparatus, process cartridge, and image forming apparatus9 Jan 2025US 2025/0013184 A1Canon Kabushiki Kaisha
- Image forming apparatus12 Sep 2024US 2024/0302785 A1Canon Kabushiki Kaisha
- Image forming apparatus15 Aug 2024US 2024/0272576 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Cleaning apparatus for a charge retentive surface36US 4,819,026 AXerox Corporation · 1989
- Image forming apparatus having an electrically charged paper dust removing brush32US 6,304,735 B1Brother Kogyo Kabushiki Kaisha · 2001
- Image forming apparatus with developing and cleaning system23US 5,148,219 AKabushiki Kaisha Toshiba · 1992
- Cleanerless electrographic imaging device23US 5,587,774 AFujitsu Limited · 1996
- Cleanerless image forming apparatus using an electrophotographic process19US 5,701,559 AKabushiki Kaisha TEC · 1997