G03G 21/1828
Prevention of damage or soiling
Official title: {Prevention of damage or soiling, e.g. mechanical abrasion (G03G21/1839 takes precedence)}
G03G21/1828 (Prevention of damage or soiling) appears on 466 US grants and 383 published applications in this corpus.
Search patents in G03G- Granted patents
- 466
- Published applications
- 383
- Assignees
- 54
- Inventors
- 670
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 15 | 0 |
| 1999 | 7 | 0 |
| 2000 | 19 | 0 |
| 2001 | 11 | 2 |
| 2002 | 8 | 14 |
| 2003 | 13 | 7 |
| 2004 | 9 | 11 |
| 2005 | 7 | 21 |
| 2006 | 18 | 19 |
| 2007 | 18 | 15 |
| 2008 | 8 | 13 |
| 2009 | 12 | 14 |
| 2010 | 13 | 24 |
| 2011 | 16 | 21 |
| 2012 | 21 | 13 |
| 2013 | 24 | 19 |
| 2014 | 20 | 25 |
| 2015 | 19 | 14 |
| 2016 | 25 | 17 |
| 2017 | 11 | 14 |
| 2018 | 14 | 8 |
| 2019 | 17 | 12 |
| 2020 | 10 | 11 |
| 2021 | 12 | 18 |
| 2022 | 13 | 9 |
| 2023 | 19 | 14 |
| 2024 | 8 | 14 |
| 2025 | 8 | 18 |
| 2026 | 11 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Roller holding unit, cartridge and image forming apparatus8 Sep 2026US 12,730,407 B2Canon Kabushiki Kaisha
- Image-forming apparatus including mechanism for maintaining opening and closing states of shutter of fixing device through urging force of urging member21 Jul 2026US 12,687,814 B2Brother Kogyo Kabushiki Kaisha
- Process unit and reception unit14 Jul 2026US 12,681,428 B2Canon Kabushiki Kaisha
- Image forming apparatus including drum cartridge and toner cartridge pivotally movable relative to drum cartridge23 Jun 2026US 12,663,752 B2Brother Kogyo Kabushiki Kaisha
- Image forming apparatus having main assembly and including detection of remaining toner in mountable cartridge19 May 2026US 12,632,004 B2Canon 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
- Image forming apparatus10 Sep 2026US 2026/0267275 A1Etria Co., Ltd.
- Sheet-shaped sealer, removable unit, and image forming apparatus27 Aug 2026US 2026/0252000 A1Etria Co., Ltd.
- Detachable cartridge27 Aug 2026US 2026/0252028 A1
- Image forming apparatus including drum cartridge and toner cartridge pivotally movable relative to drum cartridge23 Jul 2026US 2026/0211369 A1Brother Kogyo Kabushiki Kaisha
Most cited
By later US patents
- Process cartridge and image forming apparatus280US 5,585,889 ACanon Kabushiki Kaisha · 1996
- Process cartridge, image forming apparatus and separating mechanism for separating developing member from photosensitive drum217US 6,681,088 B2Canon Kabushiki Kaisha · 2004
- Developing apparatus, process cartridge, connecting method between developing frame and developer frame, and flexible seal172US 6,603,939 B1Canon Kabushiki Kaisha · 2003
- Process cartridge and electrophotographic image forming apparatus168US 7,149,457 B2Canon Kabushiki Kaisha · 2006
- Process cartridge, method for assembling process cartridge and image forming appararatus167US 5,500,714 ACanon Kabushiki Kaisha · 1996