G03G 21/0064
Using the developing unit
Official title: {using the developing unit, e.g. cleanerless or multi-cycle apparatus}
G03G21/0064 (Using the developing unit) appears on 332 US grants and 254 published applications in this corpus.
Search patents in G03G- Granted patents
- 332
- Published applications
- 254
- Assignees
- 46
- Inventors
- 499
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 8 | 0 |
| 1994 | 7 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 7 | 0 |
| 1998 | 22 | 0 |
| 1999 | 12 | 0 |
| 2000 | 7 | 0 |
| 2001 | 7 | 4 |
| 2002 | 7 | 7 |
| 2003 | 7 | 11 |
| 2004 | 7 | 16 |
| 2005 | 13 | 8 |
| 2006 | 9 | 14 |
| 2007 | 9 | 10 |
| 2008 | 11 | 18 |
| 2009 | 8 | 9 |
| 2010 | 13 | 9 |
| 2011 | 15 | 6 |
| 2012 | 5 | 8 |
| 2013 | 10 | 4 |
| 2014 | 4 | 6 |
| 2015 | 6 | 3 |
| 2016 | 5 | 8 |
| 2017 | 5 | 8 |
| 2018 | 13 | 19 |
| 2019 | 18 | 7 |
| 2020 | 4 | 3 |
| 2021 | 3 | 5 |
| 2022 | 10 | 14 |
| 2023 | 12 | 23 |
| 2024 | 17 | 16 |
| 2025 | 17 | 15 |
| 2026 | 7 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Image-forming apparatus generating electrical discharge upstream of transfer portion22 Sep 2026US 12,743,041 B2Canon Kabushiki Kaisha
- Image forming apparatus25 Aug 2026US 12,717,266 B2Canon Kabushiki Kaisha
- Image forming apparatus18 Aug 2026US 12,710,705 B2Canon Kabushiki Kaisha
- Image forming apparatus controlling charging voltages26 May 2026US 12,638,798 B2Canon Kabushiki Kaisha
- Image forming apparatus28 Apr 2026US 12,613,489 B2Canon Kabushiki Kaisha
- Image forming apparatus21 May 2026US 2026/0140473 A1Canon Kabushiki Kaisha
- Process unit and image forming apparatus30 Apr 2026US 2026/0118795 A1Canon Kabushiki Kaisha
- Process unit and image forming apparatus9 Apr 2026US 2026/0099110 A1Canon Kabushiki Kaisha
- Image forming apparatus and process cartridge9 Oct 2025US 2025/0315004 A1
- Image forming apparatus25 Sep 2025US 2025/0298346 A1Ricoh Company, Ltd.
Most cited
By later US patents
- Image forming apparatus including means for removing residual toner57US 4,769,676 AKabushiki Kaisha Toshiba · 1988
- Image forming apparatus having paper-dust removing devices53US 6,219,505 B1Brother Kogyo Kabushiki Kaisha · 2001
- Configured to enhance toner collecting efficiency and toner redepositing efficiency51US 5,740,494 ARicoh Company, Ltd. · 1998
- Image forming apparatus and cleaning device therefor42US 5,606,408 ARicoh Company, Ltd. · 1997
- Toner, developing device, and image forming apparatus35US 10,156,800 B2Canon Kabushiki Kaisha · 2018