C01B 21/0422
By reduction
Official title: {by reduction}
C01B21/0422 (By reduction) appears on 29 US grants and 25 published applications in this corpus.
Search patents in C01B- Granted patents
- 29
- Published applications
- 25
- Assignees
- 26
- Inventors
- 73
- Latest grant
- 9 May 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 2 | 0 |
| 2014 | 0 | 2 |
| 2015 | 0 | 2 |
| 2016 | 3 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 3 |
| 2019 | 3 | 3 |
| 2020 | 3 | 1 |
| 2021 | 2 | 1 |
| 2022 | 0 | 2 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Photocatalyst comprising bimetallic nanoparticles and graphene oxide for denitrification reaction, and water treatment method using same9 May 2023US 11,642,662 B2Postech Research and Business Development Foundation
- Process for argon and nitrogen production31 Aug 2021US 11,104,576 B2Casale SA
- SCR diesel particle filter with oxidation catalyst and oxygen storage catalyst loadings, and exhaust system including the same9 Feb 2021US 10,914,214 B2Umicore AG & Co. KG
- Bi-metallic oxidation catalyst materials and appurtenant devices and systems25 Aug 2020US 10,753,247 B2GM Global Technology Operations LLC
- Single step solution combustion synthesis of crystalline transuranic-doped rare earth zirconate pyrochlores17 Mar 2020US 10,590,005 B2Savannah River Nuclear Solutions, LLC
- High efficiency electro-photocatalysts16 Jul 2026US 2026/0199827 A1
- Thermally driven nitrogen and ammonia production13 Nov 2025US 2025/0346489 A1National Technology & Engineering Solutions of Sandia, LLC
- Systems and methods for obtaining nitrogen and carbon dioxide from a flue gas3 Oct 2024US 2024/0325974 A1American Energy Corporation
- Photocatalyst comprising bimetallic nanoparticles and graphene oxide for denitrification reaction, and water treatment method using same18 Aug 2022US 2022/0258139 A1Postech Research and Business Development Foundation
- System and method for adjusting pressure in a reservoir and system for producing at least one energy carrier17 Mar 2022US 2022/0081295 A1L2 Consultancy B.V.
Most cited
By later US patents
- Adsorbent regeneration and gas separation utilizing microwave heating96US 4,322,394 ABattelle Memorial Institute · 1982
- Method for producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenance68US 7,468,173 B2Sunstone Corporation · 2008
- Process for preparing ultra-pure nitrogen16US 5,238,670 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1993
- Compact deoxo system13US 6,168,774 APraxair Technology, Inc. · 2001
- Apparatus for preparing ultra-pure nitrogen12US 5,478,534 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1995