C01B 23/0015
Chemical processing only
Official title: {Chemical processing only}
C01B23/0015 (Chemical processing only) appears on 21 US grants and 24 published applications in this corpus.
Search patents in C01B- Granted patents
- 21
- Published applications
- 24
- Assignees
- 15
- Inventors
- 57
- 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 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 2 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 2 |
| 2015 | 1 | 2 |
| 2016 | 1 | 2 |
| 2017 | 2 | 1 |
| 2018 | 1 | 2 |
| 2019 | 1 | 0 |
| 2020 | 0 | 2 |
| 2021 | 2 | 1 |
| 2022 | 2 | 1 |
| 2023 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
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.
- Methods and systems for managing gas purification4 Jan 2022US 11,213,786 B2Mecanique Analytique Inc.
- Process for argon and nitrogen production31 Aug 2021US 11,104,576 B2Casale SA
- 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
- 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
- Process for argon and nitrogen production28 May 2020US 2020/0165131 A1Casale SA
Most cited
By later US patents
- Removal of gaseous contaminants from argon45US 7,862,645 B2Air Products and Chemicals, Inc. · 2011
- 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
- Helium reclamation systems and methods for a gas chromatograph4US 8,308,854 B2Thermo Finnigan LLC · 2012