G03G 21/1814
Details of parts of process cartridge
Official title: {Details of parts of process cartridge, e.g. for charging, transfer, cleaning, developing (G03G21/1835 takes precedence)}
G03G21/1814 (Details of parts of process cartridge) appears on 1,266 US grants and 1,385 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,266
- Published applications
- 1,385
- Assignees
- 73
- Inventors
- 1,668
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 10 | 0 |
| 1992 | 13 | 0 |
| 1993 | 13 | 0 |
| 1994 | 7 | 0 |
| 1995 | 8 | 0 |
| 1996 | 9 | 0 |
| 1997 | 9 | 0 |
| 1998 | 9 | 0 |
| 1999 | 4 | 0 |
| 2000 | 12 | 0 |
| 2001 | 10 | 13 |
| 2002 | 12 | 22 |
| 2003 | 23 | 10 |
| 2004 | 13 | 12 |
| 2005 | 8 | 16 |
| 2006 | 12 | 13 |
| 2007 | 14 | 20 |
| 2008 | 9 | 12 |
| 2009 | 12 | 22 |
| 2010 | 18 | 9 |
| 2011 | 13 | 27 |
| 2012 | 16 | 25 |
| 2013 | 27 | 48 |
| 2014 | 51 | 46 |
| 2015 | 60 | 46 |
| 2016 | 61 | 47 |
| 2017 | 46 | 84 |
| 2018 | 75 | 68 |
| 2019 | 84 | 79 |
| 2020 | 93 | 101 |
| 2021 | 86 | 108 |
| 2022 | 90 | 91 |
| 2023 | 74 | 106 |
| 2024 | 72 | 105 |
| 2025 | 90 | 141 |
| 2026 | 83 | 114 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Developing cartridge6 Oct 2026US 12,754,494 B2Brother Kogyo Kabushiki Kaisha
- Cartridge and image forming apparatus6 Oct 2026US 12,754,510 B2Canon Kabushiki Kaisha
- Cartridge, toner cartridge, and image forming apparatus29 Sep 2026US 12,748,375 B2Canon Kabushiki Kaisha
- Electrophotographic conductive roller, process cartridge, and electrophotographic image forming apparatus15 Sep 2026US 12,736,893 B2Canon Kabushiki Kaisha
- Image forming apparatus with a reflector disposed on a cleaning blade support15 Sep 2026US 12,736,909 B2Ricoh Company, Ltd.
- Toner, developer, toner storage unit, image forming apparatus, and image forming method8 Oct 2026US 2026/0310110 A1
- Electrostatic charge image developing toner set, electrostatic charge image developer set, toner cartridge set, process cartridge, and image forming apparatus1 Oct 2026US 2026/0299451 A1FUJIFILM Business Innovation Corp.
- Electrophotographic image forming apparatus, cartridge and drum unit1 Oct 2026US 2026/0299509 A1Canon Kabushiki Kaisha
- Image forming apparatus and cartridge1 Oct 2026US 2026/0299510 A1Canon Kabushiki Kaisha
- Image forming apparatus including main body housing, process unit, fixing device, exhaust fan, first duct, filter and seal1 Oct 2026US 2026/0299513 A1Brother Kogyo Kabushiki Kaisha
Most cited
By later US patents
- Process cartridge and electrophotographic image forming apparatus194US 5,946,531 ACanon Kabushiki Kaisha · 1999
- Developing device and process cartridge comprising first and second sealing members and electrophotographic image forming apparatus comprising a developing device comprising first and second sealing members165US 6,823,153 B2Canon Kabushiki Kaisha · 2004
- Process cartridge and electrophotographic image forming apparatus149US 7,139,502 B2Canon Kabushiki Kaisha · 2006
- Process cartridge, method for assembling process cartridge and image forming apparatus138US 5,543,898 ACanon Kabushiki Kaisha · 1996
- Process cartridge and image forming apparatus on which process cartridge is mountable116US 5,331,372 ACanon Kabushiki Kaisha · 1994