C01B 23/0021
By oxidation
Official title: {by oxidation}
C01B23/0021 (By oxidation) appears on 13 US grants and 14 published applications in this corpus.
Search patents in C01B- Granted patents
- 13
- Published applications
- 14
- Assignees
- 9
- Inventors
- 35
- Latest grant
- 14 Mar 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 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 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 2 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 2 |
| 2017 | 1 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for pretreating and recovering a rare gas from a gas contaminant stream exiting an etch chamber14 Mar 2023US 11,603,313 B2Praxair Technology, Inc.
- Method for refining argon gas and recovering and refining apparatus for argon gas19 Apr 2022US 11,305,994 B2Shin-Etsu Handotai Co., Ltd.
- Helium purification process and unit1 Jun 2021US 11,021,366 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method for recovering and purifying argon gas from silicon single crystal manufacturing apparatus and apparatus for recovering and purifying argon gas13 Feb 2018US 9,890,044 B2Shin-Etsu Handotai Co., Ltd.
- Integrated process and apparatus for recovery of helium rich streams18 Apr 2017US 9,623,370 B2Praxair Technology, Inc.
- Novel method for pretreating and recovering a rare gas from a gas contaminant stream exiting an etch chamber15 Jun 2023US 2023/0183068 A1
- Method for pretreating and recovering a rare gas from a gas contaminant stream exiting an etch chamber17 Nov 2022US 2022/0363540 A1Praxair Technology, Inc.
- Helium purification process and unit18 Nov 2021US 2021/0354987 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Helium purification process and unit10 Dec 2020US 2020/0385269 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method for refining argon gas and recovering and refining apparatus for argon gas22 Feb 2018US 2018/0050912 A1Shin-Etsu Handotai Co., Ltd.
Most cited
By later US patents
- Process and apparatus for recovering inert gas9US 4,623,524 AHitachi, Ltd. · 1986
- Process for the removal of an impurity contained in a composite gas9US 5,693,302 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1997
- Process for the elimination of impurities contained in a gaseous compound4US 5,662,873 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1997
- Process and apparatus for removing carbon monoxide from a gas stream3US 6,531,105 B1Air Liquide America Corporation · 2003
- Method for refining argon gas and recovering and refining apparatus for argon gas1US 11,305,994 B2Shin-Etsu Handotai Co., Ltd. · 2022