G03G 21/20
Humidity or temperature control also ozone evacuation
Official title: Humidity or temperature control {also ozone evacuation; Internal apparatus environment control}
G03G21/20 (Humidity or temperature control also ozone evacuation) appears on 1,834 US grants and 1,933 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,834
- Published applications
- 1,933
- Assignees
- 137
- Inventors
- 3,064
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 6 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 10 | 0 |
| 1992 | 14 | 0 |
| 1993 | 3 | 0 |
| 1994 | 10 | 0 |
| 1995 | 8 | 0 |
| 1996 | 12 | 0 |
| 1997 | 9 | 0 |
| 1998 | 10 | 0 |
| 1999 | 11 | 0 |
| 2000 | 11 | 0 |
| 2001 | 16 | 9 |
| 2002 | 21 | 18 |
| 2003 | 18 | 19 |
| 2004 | 15 | 31 |
| 2005 | 24 | 37 |
| 2006 | 31 | 53 |
| 2007 | 34 | 52 |
| 2008 | 34 | 57 |
| 2009 | 35 | 52 |
| 2010 | 49 | 46 |
| 2011 | 53 | 81 |
| 2012 | 46 | 73 |
| 2013 | 58 | 80 |
| 2014 | 97 | 108 |
| 2015 | 138 | 112 |
| 2016 | 138 | 113 |
| 2017 | 92 | 105 |
| 2018 | 102 | 112 |
| 2019 | 117 | 91 |
| 2020 | 109 | 106 |
| 2021 | 83 | 90 |
| 2022 | 81 | 111 |
| 2023 | 81 | 87 |
| 2024 | 78 | 90 |
| 2025 | 79 | 109 |
| 2026 | 52 | 91 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Image forming apparatus22 Sep 2026US 12,743,049 B2Canon Kabushiki Kaisha
- Cooling device for fixing device22 Sep 2026US 12,743,050 B2Hewlett-Packard Development Company, L. P.
- Image forming apparatus having cyclonic separating portion, toner container, and developing apparatus15 Sep 2026US 12,736,896 B2Canon Kabushiki Kaisha
- Cartridge and image forming apparatus to convey toner using air8 Sep 2026US 12,730,393 B2Canon Kabushiki Kaisha
- Image forming apparatus with cooling configuration8 Sep 2026US 12,730,409 B2Canon Kabushiki Kaisha
- Image forming apparatus, image forming system, and non-transitory computer readable medium storing image forming program1 Oct 2026US 2026/0299479 A1FUJIFILM Business Innovation Corp.
- Post-processing device and image forming system using post-processing device1 Oct 2026US 2026/0299497 A1FUJIFILM Business Innovation Corp.
- Developing device1 Oct 2026US 2026/0299511 A1FUJIFILM Business Innovation Corp.
- Image forming apparatus1 Oct 2026US 2026/0299512 A1Brother Kogyo 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
- Ozone collection and filtration system102US 4,388,274 AXerox Corporation · 1983
- Process kit and image forming apparatus using such kit96US 4,540,268 ACanon Kabushiki Kaisha · 1985
- Process cartridge and image forming apparatus83US 6,219,504 B1Canon Kabushiki Kaisha · 2001
- Recording apparatus and ink cartridge72US 4,893,137 ACanon Kabushiki Kaisha · 1990
- Particulate filtering58US 4,188,197 ADennison Manufacturing Company · 1980