B01D 2256/10
Nitrogen
B01D2256/10 (Nitrogen) appears on 755 US grants and 779 published applications in this corpus.
Search patents in B01D- Granted patents
- 755
- Published applications
- 779
- Assignees
- 435
- Inventors
- 2,020
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 8 | 0 |
| 1984 | 10 | 0 |
| 1985 | 7 | 0 |
| 1986 | 6 | 0 |
| 1987 | 7 | 0 |
| 1988 | 16 | 0 |
| 1989 | 8 | 0 |
| 1990 | 10 | 0 |
| 1991 | 8 | 0 |
| 1992 | 14 | 0 |
| 1993 | 11 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 8 | 0 |
| 1997 | 12 | 0 |
| 1998 | 11 | 0 |
| 1999 | 18 | 0 |
| 2000 | 15 | 0 |
| 2001 | 9 | 1 |
| 2002 | 18 | 7 |
| 2003 | 12 | 10 |
| 2004 | 6 | 11 |
| 2005 | 10 | 14 |
| 2006 | 8 | 11 |
| 2007 | 7 | 12 |
| 2008 | 4 | 5 |
| 2009 | 7 | 21 |
| 2010 | 11 | 11 |
| 2011 | 7 | 13 |
| 2012 | 14 | 15 |
| 2013 | 13 | 15 |
| 2014 | 15 | 20 |
| 2015 | 17 | 42 |
| 2016 | 29 | 38 |
| 2017 | 31 | 37 |
| 2018 | 34 | 41 |
| 2019 | 26 | 62 |
| 2020 | 45 | 56 |
| 2021 | 45 | 66 |
| 2022 | 41 | 50 |
| 2023 | 40 | 58 |
| 2024 | 45 | 58 |
| 2025 | 35 | 55 |
| 2026 | 23 | 50 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mixed gas separation method and mixed gas separation apparatus22 Sep 2026US 12,741,246 B2NGK Insulators, Ltd.
- Gas separation membrane8 Sep 2026US 12,728,393 B2Seiko Epson Corporation
- CO2 separation systems and methods25 Aug 2026US 12,714,970 B2Carbonquest, Inc.
- Steel mill offgas separation and purification18 Aug 2026US 12,708,874 B2Air Products and Chemicals, Inc.
- Reactor vent control to avoid vent column breakthrough18 Aug 2026US 12,709,650 B2ExxonMobil Chemical Patents Inc.
- Integration of fuel cell system and co2 capture unit for hydrogen production8 Oct 2026US 2026/0312105 A1Uop LLC
- System and method for separation and use of nitrogen from inlet air or flue gas24 Sep 2026US 2026/0284593 A1GE Infrastructure Technology LLC
- Separation membrane17 Sep 2026US 2026/0273479 A1Nitto Denko Corporation
- Carbon dioxide separation device10 Sep 2026US 2026/0263998 A1Honda Motor Co., Ltd.
- Gas purification method10 Sep 2026US 2026/0264002 A1Shenyang Starlight New Materials Co., Ltd.
Most cited
By later US patents
- Process for purifying a gas by adsorption of the impurities on several active carbons147US 6,402,813 B2L 'Air Liquide-Societe 'Anonyme a 'Directoire et Conseil de Surveillance pour l 'Etude et L'Exploitation des Procedes Georges Claude · 2002
- Methods and apparatuses for gas separation by pressure swing adsorption with partial gas product feed to fuel cell power source139US 6,866,950 B2QuestAir Technologies Inc. · 2005
- Process for separating components of a gas stream137US 4,701,187 AAir Products and Chemicals, Inc. · 1987
- Extraction and concentration of a gas component117US 5,082,473 A1992
- Layered manifold pressure swing adsorption device and method106US 6,565,635 B2QuestAir Technologies Inc. · 2003