C22B 9/226
By electric discharge
Official title: {by electric discharge, e.g. plasma (C22B9/20 takes precedence; apparatus therefor H01J, H05B, H05H; chemical reactions with metals in a plasma C22B4/005)}
C22B9/226 (By electric discharge) appears on 101 US grants and 47 published applications in this corpus.
Search patents in C22B- Granted patents
- 101
- Published applications
- 47
- Assignees
- 66
- Inventors
- 210
- Latest grant
- 28 May 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 6 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 8 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 1 |
| 2004 | 1 | 4 |
| 2005 | 2 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 2 |
| 2008 | 0 | 2 |
| 2009 | 2 | 1 |
| 2010 | 1 | 6 |
| 2011 | 3 | 6 |
| 2012 | 3 | 1 |
| 2013 | 3 | 1 |
| 2014 | 2 | 2 |
| 2015 | 2 | 1 |
| 2016 | 1 | 4 |
| 2017 | 3 | 3 |
| 2018 | 1 | 2 |
| 2019 | 5 | 0 |
| 2020 | 1 | 3 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 2 | 2 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Magnetoplasmadynamic apparatus and process for the separation and deposition of materials173US 4,471,003 A1984
- Magnetoplasmadynamic apparatus for the separation and deposition of materials104US 4,487,162 A1984
- Cold hearth refining apparatus32US 4,932,635 AAxel Johnson Metals, Inc. · 1990
- Process for the preparation of tantalum and niobium powders of improved efficiency31US 4,231,790 AHermann C. Starck Berlin · 1980
- Process for the recovery of platinum group metals from refractory ceramic substrates29US 4,428,768 AJohnson Matthey PLC · 1984