B03C 3/84
Protective coatings
B03C3/84 (Protective coatings) appears on 11 US grants and 3 published applications in this corpus.
Search patents in B03C- Granted patents
- 11
- Published applications
- 3
- Assignees
- 10
- Inventors
- 21
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Positive and negative oxygen ion air purification system using dielectric barrier discharge for rail transport6 Jan 2026US 12,514,952 B2Knorr-Bremse Espana SA
- Air cleaner including touch points10 May 2011US 7,938,896 B2Oreck Holdings, LLC
- Air cleaner and its ionizing unit20 Jan 2004US 6,679,940 B1Daikin Industres, Ltd.
- Air purification device with a needle-shaped electrode having a protective cover thereon16 Sep 2003US 6,620,224 B1Circland Corp.
- Collector electrode assembly for tubular electrostatic precipitator17 Sep 1985US 4,541,849 AMetallgesellschaft Aktiengesellschaft
- Positive and negative oxygen ion air purification system using dielectric barrier discharge for rail transport22 Jun 2023US 2023/0190985 A1Knorr-Bremse Espana SA
- Devices for removing particles from a gas comprising an electrostatic precipitator18 Feb 2010US 2010/0037776 A1
- Air cleaner including touch points14 Feb 2008US 2008/0034976 A1Oreck Holdings, LLC
Most cited
By later US patents
- Process and material for treating steel walls and fans in electrical precipitation installations with micron colloidal graphite particles24US 4,239,818 A1980
- Air cleaner and its ionizing unit24US 6,679,940 B1Daikin Industres, Ltd. · 2004
- Air cleaner including touch points20US 7,938,896 B2Oreck Holdings, LLC · 2011
- Electrostatic precipitators18US 4,177,047 AJoy Manufacturing Company · 1979
- Corrosion resistant electrostatic precipitator17US 4,077,785 AResearch-Cottrell, Inc. · 1978