G03G 2221/18
Cartridge systems
G03G2221/18 (Cartridge systems) appears on 2,821 US grants and 2,270 published applications in this corpus.
Search patents in G03G- Granted patents
- 2,821
- Published applications
- 2,270
- Assignees
- 154
- Inventors
- 2,946
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 8 | 0 |
| 1986 | 20 | 0 |
| 1987 | 16 | 0 |
| 1988 | 23 | 0 |
| 1989 | 31 | 0 |
| 1990 | 35 | 0 |
| 1991 | 41 | 0 |
| 1992 | 45 | 0 |
| 1993 | 36 | 0 |
| 1994 | 39 | 0 |
| 1995 | 20 | 0 |
| 1996 | 39 | 0 |
| 1997 | 40 | 0 |
| 1998 | 67 | 0 |
| 1999 | 57 | 0 |
| 2000 | 64 | 0 |
| 2001 | 82 | 34 |
| 2002 | 87 | 114 |
| 2003 | 91 | 78 |
| 2004 | 81 | 115 |
| 2005 | 82 | 167 |
| 2006 | 119 | 173 |
| 2007 | 147 | 151 |
| 2008 | 128 | 125 |
| 2009 | 92 | 101 |
| 2010 | 126 | 88 |
| 2011 | 104 | 85 |
| 2012 | 98 | 85 |
| 2013 | 88 | 45 |
| 2014 | 76 | 73 |
| 2015 | 79 | 79 |
| 2016 | 99 | 61 |
| 2017 | 60 | 59 |
| 2018 | 60 | 62 |
| 2019 | 77 | 67 |
| 2020 | 81 | 82 |
| 2021 | 64 | 86 |
| 2022 | 73 | 73 |
| 2023 | 83 | 68 |
| 2024 | 57 | 75 |
| 2025 | 50 | 78 |
| 2026 | 33 | 46 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Image forming apparatus1 Sep 2026US 12,724,360 B2Ricoh Company, Ltd.
- Drum cartridge including storage medium having electrical contact surface positioned at outer surface of drum frame25 Aug 2026US 12,717,273 B2Brother Kogyo Kabushiki Kaisha
- Developing cartridge for detachable mounting to an imaging device25 Aug 2026US 12,717,274 B2Zhuhai Un-Tern Imaging Products Co., Ltd
- Electrophotographic photoreceptor, process cartridge, and image forming apparatus1 Oct 2026US 2026/0299445 A1KYOCERA Document Solutions Inc.
- Electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, and image forming apparatus1 Oct 2026US 2026/0299450 A1FUJIFILM Business Innovation Corp.
- Electrophotographic photoreceptor, process cartridge, and image forming apparatus24 Sep 2026US 2026/0288023 A1FUJIFILM Business Innovation Corp.
- Electrophotographic photoreceptor, process cartridge, and image forming apparatus10 Sep 2026US 2026/0267244 A1KYOCERA Document Solutions Inc.
- Electrophotographic photoreceptor, method of producing an electrophotographic photoreceptor, process cartridge, and image forming apparatus10 Sep 2026US 2026/0267246 A1KYOCERA Document Solutions Inc.
Most cited
By later US patents
- Monitor/warranty system for electrostatographic reproducing machines using replaceable cartridges419US 4,961,088 AXerox Corporation · 1990
- Replaceable part with integral memory for usage, calibration and other data311US 5,835,817 AHewlett-Packard Company · 1998
- Process cartridge, electrophotographic image forming apparatus, driving force transmission part, and electrophotographic photosensitive drum289US 5,903,803 ACanon Kabushiki Kaisha · 1999
- Process cartridge and image forming apparatus280US 5,585,889 ACanon Kabushiki Kaisha · 1996
- Method of calibrating a spatial light modulator printing system280US 5,842,088 ATexas Instruments Incorporated · 1998