C01B 21/0433
Physical processing only
Official title: {Physical processing only}
C01B21/0433 (Physical processing only) appears on 244 US grants and 148 published applications in this corpus.
Search patents in C01B- Granted patents
- 244
- Published applications
- 148
- Assignees
- 147
- Inventors
- 580
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 7 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 10 | 0 |
| 1997 | 7 | 0 |
| 1998 | 8 | 0 |
| 1999 | 15 | 0 |
| 2000 | 9 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 4 |
| 2003 | 10 | 3 |
| 2004 | 4 | 7 |
| 2005 | 3 | 6 |
| 2006 | 0 | 5 |
| 2007 | 4 | 7 |
| 2008 | 3 | 2 |
| 2009 | 1 | 2 |
| 2010 | 3 | 9 |
| 2011 | 6 | 7 |
| 2012 | 5 | 4 |
| 2013 | 8 | 5 |
| 2014 | 5 | 6 |
| 2015 | 10 | 9 |
| 2016 | 7 | 12 |
| 2017 | 11 | 10 |
| 2018 | 6 | 11 |
| 2019 | 9 | 9 |
| 2020 | 3 | 7 |
| 2021 | 10 | 5 |
| 2022 | 2 | 3 |
| 2023 | 4 | 4 |
| 2024 | 2 | 3 |
| 2025 | 1 | 7 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Integrated ammonia and sulfuric acid production plant and process20 Jan 2026US 12,528,752 B2Chemetics Inc.
- Apparatus, system and method for generating nitrogen gas from fuel-cell exhaust gas23 Sep 2025US 12,424,645 B2Micro Control Systems Ltd.
- Apparatus and system for generating nitrogen gas through dehumidifying and filtering fuel cell exhaust gas7 May 2024US 11,978,935 B2Micro Control Systems Ltd.
- Self-contained nitrogen generator16 Jan 2024US 11,872,523 B2
- Air separators and related methods3 Oct 2023US 11,772,040 B2JDL Tech USA LLC
- Combined Inert Gas and Instrument Air System for Marine Applications30 Apr 2026US 2026/0115651 A1Air Products and Chemicals, Inc.
- Floating power generation unit18 Dec 2025US 2025/0382035 A1
- Reducing Energy Consumption in Nitrogen Production Using a Turboexpander19 Jun 2025US 2025/0196057 A1Air Products and Chemicals, Inc.
- Apparatus and Method for Nitrogen Generation for Methanol Powered Maritime Vehicle19 Jun 2025US 2025/0197218 A1Air Products and Chemicals, Inc.
- Geothermally driven ammonia production1 May 2025US 2025/0136457 A1EnhancedGEO Holdings, LLC
Most cited
By later US patents
- Process for separating components of a gas stream137US 4,701,187 AAir Products and Chemicals, Inc. · 1987
- Layered manifold pressure swing adsorption device and method106US 6,565,635 B2QuestAir Technologies Inc. · 2003
- Liquid absorbent solutions for separating nitrogen from natural gas103US 6,136,222 ABend Research, Inc. · 2000
- Adsorbent regeneration and gas separation utilizing microwave heating96US 4,322,394 ABattelle Memorial Institute · 1982
- Process and apparatus for producing liquid carbon dioxide93US 5,233,837 AEnerfex, Inc. · 1993