G03G 21/00
Arrangements not provided for by groups g03g13/00 - g03g19/00
Official title: Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
G03G21/00 (Arrangements not provided for by groups g03g13/00 - g03g19/00) appears on 17,991 US grants and 16,843 published applications in this corpus.
Search patents in G03G- Granted patents
- 17,991
- Published applications
- 16,843
- Assignees
- 676
- Inventors
- 14,893
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 40 | 0 |
| 1977 | 39 | 0 |
| 1978 | 50 | 0 |
| 1979 | 39 | 0 |
| 1980 | 41 | 0 |
| 1981 | 60 | 0 |
| 1982 | 50 | 0 |
| 1983 | 57 | 0 |
| 1984 | 72 | 0 |
| 1985 | 71 | 0 |
| 1986 | 81 | 0 |
| 1987 | 100 | 0 |
| 1988 | 87 | 0 |
| 1989 | 115 | 0 |
| 1990 | 125 | 0 |
| 1991 | 131 | 0 |
| 1992 | 150 | 0 |
| 1993 | 157 | 0 |
| 1994 | 158 | 0 |
| 1995 | 144 | 0 |
| 1996 | 167 | 0 |
| 1997 | 177 | 0 |
| 1998 | 242 | 0 |
| 1999 | 217 | 0 |
| 2000 | 218 | 0 |
| 2001 | 209 | 81 |
| 2002 | 196 | 246 |
| 2003 | 226 | 269 |
| 2004 | 223 | 271 |
| 2005 | 208 | 446 |
| 2006 | 299 | 528 |
| 2007 | 335 | 588 |
| 2008 | 349 | 582 |
| 2009 | 352 | 639 |
| 2010 | 502 | 605 |
| 2011 | 589 | 731 |
| 2012 | 626 | 700 |
| 2013 | 729 | 759 |
| 2014 | 897 | 895 |
| 2015 | 1145 | 875 |
| 2016 | 1056 | 856 |
| 2017 | 785 | 925 |
| 2018 | 865 | 900 |
| 2019 | 946 | 794 |
| 2020 | 864 | 871 |
| 2021 | 766 | 860 |
| 2022 | 748 | 719 |
| 2023 | 682 | 697 |
| 2024 | 599 | 724 |
| 2025 | 594 | 762 |
| 2026 | 413 | 520 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G03G 21/16Mechanical means for facilitating the maintenance of the apparatus11,003
- G03G 21/0005Arrangements not provided for by groups g03g13/00 - g03g19/00: for removing solid2,805
- G03G 21/20Humidity or temperature control also ozone evacuation1,834
- G03G 21/10Collecting or recycling waste developer1,668
- G03G 21/04Preventing copies being made of an original477
- G03G 21/06Eliminating residual charges from a reusable imaging member395
- G03G 21/14Electronic sequencing control337
- G03G 21/0094Fatigue treatment of the photoconductor334
All 10 subgroupsShow fewer
Recent patents
- Image carrier unit and image forming apparatus6 Oct 2026US 12,754,492 B2FUJIFILM Business Innovation Corp.
- Developing cartridge6 Oct 2026US 12,754,494 B2Brother Kogyo Kabushiki Kaisha
- Intermediate transfer unit and image forming apparatus with replaceable cleaning device6 Oct 2026US 12,754,495 B2Canon Kabushiki Kaisha
- Heater including heat generating pattern and electrode having connector therebetween6 Oct 2026US 12,754,500 B2Hewlett-Packard Development Company, L. P.
- Image forming apparatus6 Oct 2026US 12,754,507 B2Konica Minolta, Inc.
- Toner, developer, toner storage unit, image forming apparatus, and image forming method8 Oct 2026US 2026/0310110 A1
- Image forming apparatus8 Oct 2026US 2026/0310115 A1Canon Kabushiki Kaisha
- Image forming apparatus8 Oct 2026US 2026/0310118 A1Canon Kabushiki Kaisha
- Fixing apparatus and image forming apparatus8 Oct 2026US 2026/0310119 A1Canon Kabushiki Kaisha
- Sheet conveyance apparatus and image forming apparatus8 Oct 2026US 2026/0310121 A1Konica Minolta, Inc.
Most cited
By later US patents
- Electronic copyright royalty accounting system using glyphs463US 5,444,779 AXerox Corporation · 1995
- Monitor/warranty system for electrostatographic reproducing machines using replaceable cartridges419US 4,961,088 AXerox Corporation · 1990
- System for electronically printing plural-color tamper-resistant documents338US 5,291,243 AXerox Corporation · 1994
- Document reproduction security system331US 4,908,873 A1990
- Replaceable part with integral memory for usage, calibration and other data311US 5,835,817 AHewlett-Packard Company · 1998