G03G 15/0844
Arrangements for purging used developer from the developing unit
Official title: {Arrangements for purging used developer from the developing unit}
G03G15/0844 (Arrangements for purging used developer from the developing unit) appears on 269 US grants and 225 published applications in this corpus.
Search patents in G03G- Granted patents
- 269
- Published applications
- 225
- Assignees
- 40
- Inventors
- 509
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 6 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 10 | 0 |
| 1996 | 8 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 2 |
| 2003 | 1 | 3 |
| 2004 | 3 | 5 |
| 2005 | 2 | 5 |
| 2006 | 6 | 6 |
| 2007 | 6 | 9 |
| 2008 | 5 | 9 |
| 2009 | 5 | 23 |
| 2010 | 5 | 11 |
| 2011 | 16 | 11 |
| 2012 | 12 | 10 |
| 2013 | 15 | 7 |
| 2014 | 9 | 10 |
| 2015 | 13 | 7 |
| 2016 | 16 | 18 |
| 2017 | 12 | 15 |
| 2018 | 17 | 14 |
| 2019 | 10 | 4 |
| 2020 | 8 | 8 |
| 2021 | 7 | 9 |
| 2022 | 9 | 11 |
| 2023 | 8 | 7 |
| 2024 | 4 | 5 |
| 2025 | 7 | 8 |
| 2026 | 5 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Developing device including spiral blade for conveying developer while rotating and image forming apparatus22 Sep 2026US 12,743,039 B2KYOCERA Document Solutions Inc.
- Toner rake assembly with static tines for improved toner raking26 May 2026US 12,638,801 B2Lexmark International, Inc.
- Image forming apparatus28 Apr 2026US 12,613,482 B2Canon Kabushiki Kaisha
- Toner cartridge with waste toner dispersing member connected to and driven by toner transport member10 Feb 2026US 12,547,097 B2Hewlett-Packard Development Company, L. P.
- Image forming apparatus having movable shutters for opening and closing toner inlets and outlets20 Jan 2026US 12,529,976 B2Brother Kogyo Kabushiki Kaisha
- Image forming apparatus8 Oct 2026US 2026/0310117 A1Canon Kabushiki Kaisha
- Image forming apparatus for transferring a developer image from an image carrier to a recording medium24 Sep 2026US 2026/0288033 A1Canon Kabushiki Kaisha
- Image forming system24 Sep 2026US 2026/0288061 A1FUJIFILM Business Innovation Corp.
- Discharge method, development device, and image forming apparatus16 Jul 2026US 2026/0202778 A1FUJIFILM Business Innovation Corp.
- Image forming apparatus11 Jun 2026US 2026/0161123 A1
Most cited
By later US patents
- Toner replenishing and developer replacing device for a developing unit of an image forming apparatus77US 5,915,155 ARicoh Company, Ltd. · 1999
- Developing apparatus68US 5,109,254 ARicoh Company, Ltd. · 1992
- Toner replenishing and developer replacing device for a developing unit of an image forming apparatus61US 6,125,243 ARicoh Company, Ltd. · 2000
- Image forming apparatus52US 5,398,098 ASharp Kabushiki Kaisha · 1995
- Developing unit for an image forming apparatus and method of collecting bicomponent developer therefrom47US 5,638,159 ARicoh Company, Ltd. · 1997