B41J 2/20
For preventing or detecting contamination of compounds
Official title: for preventing or detecting contamination of compounds
B41J2/20 (For preventing or detecting contamination of compounds) appears on 129 US grants and 147 published applications in this corpus.
Search patents in B41J- Granted patents
- 129
- Published applications
- 147
- Assignees
- 52
- Inventors
- 362
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 3 | 3 |
| 2004 | 1 | 2 |
| 2005 | 2 | 2 |
| 2006 | 1 | 3 |
| 2007 | 0 | 0 |
| 2008 | 3 | 3 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 2 |
| 2012 | 0 | 6 |
| 2013 | 3 | 5 |
| 2014 | 6 | 4 |
| 2015 | 6 | 7 |
| 2016 | 9 | 8 |
| 2017 | 4 | 3 |
| 2018 | 6 | 8 |
| 2019 | 4 | 4 |
| 2020 | 7 | 7 |
| 2021 | 5 | 3 |
| 2022 | 4 | 10 |
| 2023 | 7 | 3 |
| 2024 | 3 | 8 |
| 2025 | 2 | 15 |
| 2026 | 5 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Inkjet printing device6 Oct 2026US 12,752,549 B2Makeblock Co., Ltd.
- Liquid discharge system and filter state determination method16 Jun 2026US 12,654,460 B2Brother Kogyo Kabushiki Kaisha
- Ink recirculating system for an inkjet printer16 Jun 2026US 12,654,463 B2Zanasi S.R.L.
- Ink supplier24 Feb 2026US 12,558,905 B2SCREEN Holdings Co., Ltd.
- Container including container body having liquid supply opening positioned below cover13 Jan 2026US 12,521,995 B2Brother Kogyo Kabushiki Kaisha
- Liquid storage tank, liquid circulation device, recording apparatus including liquid circulation device, and liquid storage tank group1 Oct 2026US 2026/0296045 A1KYOCERA Corporation
- Liquid discharge apparatus and supply control method17 Sep 2026US 2026/0273943 A1
- Liquid ejection head3 Sep 2026US 2026/0257475 A1RISO Technologies Corporation
- Liquid storage container20 Aug 2026US 2026/0241697 A1Canon Kabushiki Kaisha
- Inkjet printing apparatus6 Aug 2026US 2026/0225370 A1SCREEN Holdings Co., Ltd.
Most cited
By later US patents
- Ink jet recording unit having an ink tank section containing porous material and a recording head section208US 5,182,581 ACanon Kabushiki Kaisha · 1993
- Ink jet printing apparatus having modular components133US 5,682,191 AIris Graphics, Inc. · 1997
- Pattern printing apparatus99US 3,956,756 AImperial Chemical Industries PLC · 1976
- Ink jet printing with color-balanced ink drops mixed using bleached ink94US 6,464,336 B1Eastman Kodak Company · 2002
- Heater assembly for printers77US 5,041,846 AHewlett-Packard Company · 1991