B01D 2259/40001
Methods relating to additional
Official title: Methods relating to additional, e.g. intermediate, treatment of process gas
B01D2259/40001 (Methods relating to additional) appears on 272 US grants and 186 published applications in this corpus.
Search patents in B01D- Granted patents
- 272
- Published applications
- 186
- Assignees
- 160
- Inventors
- 633
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 13 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 10 | 0 |
| 1993 | 8 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 16 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 2 |
| 2002 | 6 | 9 |
| 2003 | 9 | 10 |
| 2004 | 4 | 14 |
| 2005 | 8 | 14 |
| 2006 | 8 | 13 |
| 2007 | 10 | 12 |
| 2008 | 13 | 8 |
| 2009 | 4 | 8 |
| 2010 | 6 | 7 |
| 2011 | 5 | 3 |
| 2012 | 7 | 5 |
| 2013 | 4 | 4 |
| 2014 | 4 | 4 |
| 2015 | 5 | 6 |
| 2016 | 4 | 6 |
| 2017 | 6 | 4 |
| 2018 | 5 | 11 |
| 2019 | 8 | 8 |
| 2020 | 6 | 7 |
| 2021 | 7 | 2 |
| 2022 | 3 | 5 |
| 2023 | 5 | 7 |
| 2024 | 3 | 6 |
| 2025 | 3 | 6 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-stage direct capture of CO2 from air11 Aug 2026US 12,702,947 B2ExxonMobil Technology and Engineering Company
- System and method for dry sorption24 Mar 2026US 12,582,938 B2Norwegian Emission Abatement Technologies AS
- Systems and methods for removal of mercury and/or hydrochloric acid from gas streams using calcium-containing particles6 Jan 2026US 12,515,165 B2Graymont (PA) Inc.
- Dryer for compressed gas, compressor installation provided with a dryer and a method for drying compressed gas2 Dec 2025US 12,485,379 B2Atlas Copco Airpower N.V.
- Adsorptive separation apparatus8 Jul 2025US 12,350,620 B2Shenzhen Biteman Technology Co., Ltd.
- Apparatus and method for adsorbing and desorbing co2 from air and a heat exchanger3 Sep 2026US 2026/0257164 A1Fugu Carbon Pty Ltd
- Carbon dioxide capture system using a liquid desiccant, and methods thereof6 Aug 2026US 2026/0225026 A1
- Process for producing very high purity helium or hydrogen30 Jul 2026US 2026/0217533 A1Air Liquide Advanced Technologies U.S. LLC
- Systems and methods for removal of mercury and/or hydrochloric acid from gas streams using calcium-containing particles2 Jul 2026US 2026/0183699 A1Graymont (PA) Inc.
- Hybrid membrane pressure swing adsorption process for separation of cracked gases from a methane pyrolysis reaction30 Apr 2026US 2026/0115653 A1
Most cited
By later US patents
- Sorbents and methods for the removal of mercury from combustion gases199US 6,953,494 B22005
- Method and apparatus for treating a sour gas146US 8,206,669 B2Air Products and Chemicals, Inc. · 2012
- Regeneration of adsorbents138US 4,784,672 AAir Products and Chemicals, Inc. · 1988
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator136US 5,979,440 ASeQual Technologies, Inc. · 1999
- Heavy hydrocarbon recovery from pressure swing adsorption unit tail gas134US 6,610,124 B1Engelhard Corporation · 2003