G03G 21/169
For the cleaning unit
Official title: {for the cleaning unit}
G03G21/169 (For the cleaning unit) appears on 154 US grants and 151 published applications in this corpus.
Search patents in G03G- Granted patents
- 154
- Published applications
- 151
- Assignees
- 22
- Inventors
- 246
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 5 | 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 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 3 |
| 2010 | 3 | 7 |
| 2011 | 4 | 6 |
| 2012 | 5 | 9 |
| 2013 | 8 | 8 |
| 2014 | 11 | 10 |
| 2015 | 13 | 17 |
| 2016 | 18 | 11 |
| 2017 | 7 | 4 |
| 2018 | 9 | 17 |
| 2019 | 13 | 5 |
| 2020 | 11 | 14 |
| 2021 | 9 | 6 |
| 2022 | 8 | 6 |
| 2023 | 8 | 10 |
| 2024 | 9 | 9 |
| 2025 | 4 | 4 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Image forming apparatus with a reflector disposed on a cleaning blade support15 Sep 2026US 12,736,909 B2Ricoh Company, Ltd.
- Image forming apparatus and paper dust cleaning device14 Jul 2026US 12,681,426 B2KYOCERA Document Solutions Inc.
- Image forming apparatus with user operated cover for removable unit31 Mar 2026US 12,591,196 B2FUJIFILM Business Innovation Corp.
- Image forming device17 Feb 2026US 12,554,210 B2Toshiba Tec Kabushiki Kaisha
- Image forming apparatus with fiber brush29 Jul 2025US 12,372,912 B2Canon Kabushiki Kaisha
- Image forming apparatus and cleaning member1 Oct 2026US 2026/0299507 A1Canon Kabushiki Kaisha
- Cleaning device and image forming apparatus13 Aug 2026US 2026/0235979 A1FUJIFILM Business Innovation Corp.
- Cleaning device and image forming apparatus28 Aug 2025US 2025/0271805 A1KYOCERA Document Solutions Inc.
- Image forming apparatus22 May 2025US 2025/0164919 A1Ricoh Company, Ltd.
- Image forming device6 Mar 2025US 2025/0076778 A1Toshiba Tec Kabushiki Kaisha
Most cited
By later US patents
- Image forming machine having a toner recycling unit45US 4,768,055 AMita Industrial Co., Ltd. · 1988
- Image forming system43US 4,876,606 ARicoh Company, Ltd. · 1989
- Image forming apparatus having a cleaning unit26US 7,899,355 B2Brother Kogyo Kabushiki Kaisha · 2011
- Image forming apparatus having a removable image forming process kit23US 4,862,209 ARicoh Company, Ltd. · 1989
- Electrostatic recording apparatus having a cooled and insulated waste toner container18US 4,891,678 ARicoh Company, Ltd. · 1990