G03G 21/10
Collecting or recycling waste developer
G03G21/10 (Collecting or recycling waste developer) appears on 1,668 US grants and 1,437 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,668
- Published applications
- 1,437
- Assignees
- 115
- Inventors
- 2,373
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 9 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 11 | 0 |
| 1986 | 10 | 0 |
| 1987 | 11 | 0 |
| 1988 | 11 | 0 |
| 1989 | 13 | 0 |
| 1990 | 12 | 0 |
| 1991 | 17 | 0 |
| 1992 | 17 | 0 |
| 1993 | 19 | 0 |
| 1994 | 16 | 0 |
| 1995 | 16 | 0 |
| 1996 | 29 | 0 |
| 1997 | 20 | 0 |
| 1998 | 29 | 0 |
| 1999 | 27 | 0 |
| 2000 | 19 | 0 |
| 2001 | 16 | 2 |
| 2002 | 16 | 16 |
| 2003 | 19 | 23 |
| 2004 | 16 | 18 |
| 2005 | 17 | 48 |
| 2006 | 36 | 48 |
| 2007 | 34 | 51 |
| 2008 | 42 | 69 |
| 2009 | 45 | 72 |
| 2010 | 39 | 75 |
| 2011 | 69 | 62 |
| 2012 | 79 | 51 |
| 2013 | 61 | 58 |
| 2014 | 62 | 62 |
| 2015 | 94 | 83 |
| 2016 | 93 | 78 |
| 2017 | 76 | 75 |
| 2018 | 68 | 69 |
| 2019 | 85 | 65 |
| 2020 | 72 | 83 |
| 2021 | 71 | 67 |
| 2022 | 66 | 65 |
| 2023 | 58 | 66 |
| 2024 | 49 | 47 |
| 2025 | 37 | 47 |
| 2026 | 27 | 37 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cartridge, toner cartridge, and image forming apparatus29 Sep 2026US 12,748,375 B2Canon Kabushiki Kaisha
- Developing device including spiral blade for conveying developer while rotating and image forming apparatus22 Sep 2026US 12,743,039 B2KYOCERA Document Solutions Inc.
- Printer apparatus with upstream toner recycling function15 Sep 2026US 12,736,895 B2Avision Inc.
- Conveying screw and image forming apparatus15 Sep 2026US 12,736,910 B2KYOCERA Document Solutions Inc.
- Image forming apparatus1 Sep 2026US 12,724,361 B2KYOCERA Document Solutions Inc.
- Method of cleaning developing agent stuck to image carrier in image forming apparatus24 Sep 2026US 2026/0288057 A1Canon Kabushiki Kaisha
- Image forming system24 Sep 2026US 2026/0288059 A1FUJIFILM Business Innovation Corp.
- Image forming system24 Sep 2026US 2026/0288061 A1FUJIFILM Business Innovation Corp.
- Image forming apparatus3 Sep 2026US 2026/0259526 A1Canon Kabushiki Kaisha
- Image forming apparatus27 Aug 2026US 2026/0252003 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Capacitive sensor168US 5,465,619 AXerox Corporation · 1995
- Process cartridge and electrophotographic image forming apparatus149US 7,139,502 B2Canon Kabushiki Kaisha · 2006
- Electrophotographic apparatus having plural image forming modes, and a process cartridge applied to such electrophotographic apparatus104US 6,157,792 ACanon Kabushiki Kaisha · 2000
- Cleaning frame, cleaning device, process cartridge and electrophotographic image forming apparatus with segregated waste toner container89US 6,055,406 ACanon Kabushiki Kaisha · 2000
- Toner storage unit86US 5,842,093 AKYOCERA Corporation · 1998