B01D 53/869
Multiple step processes
Official title: {Multiple step processes}
B01D53/869 (Multiple step processes) appears on 128 US grants and 173 published applications in this corpus.
Search patents in B01D- Granted patents
- 128
- Published applications
- 173
- Assignees
- 119
- Inventors
- 420
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 3 |
| 2008 | 1 | 2 |
| 2009 | 1 | 2 |
| 2010 | 4 | 2 |
| 2011 | 1 | 7 |
| 2012 | 2 | 4 |
| 2013 | 2 | 12 |
| 2014 | 7 | 7 |
| 2015 | 7 | 14 |
| 2016 | 5 | 12 |
| 2017 | 11 | 16 |
| 2018 | 12 | 9 |
| 2019 | 13 | 18 |
| 2020 | 13 | 9 |
| 2021 | 10 | 6 |
| 2022 | 5 | 8 |
| 2023 | 9 | 10 |
| 2024 | 5 | 8 |
| 2025 | 3 | 11 |
| 2026 | 6 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Steel mill offgas separation and purification18 Aug 2026US 12,708,874 B2Air Products and Chemicals, Inc.
- System and method for pre-purification of a feed gas stream4 Aug 2026US 12,697,584 B2Linde Aktiengesellschaft
- Gas treatment system, semiconductor process system including the same, and gas treatment method using the same26 May 2026US 12,636,612 B2Samsung Electronics Co., Ltd.
- Method for reducing risk of burning and explosion in deoxygenation process of oxygen-containing gas21 Apr 2026US 12,606,505 B2China Petroleum & Chemical Corporation
- Devices and methods for gas purification treatment17 Mar 2026US 12,576,361 B2Harbin Institute of Technology, Shenzhen
- Gas treatment system, semiconductor process system including the same, and gas treatment method using the same10 Sep 2026US 2026/0264013 A1Samsung Electronics Co., Ltd.
- Tail gas treatment by two stage adsorption with intermediate cooling30 Jul 2026US 2026/0216647 A1Saudi Arabian Oil Company
- Reducing the content of nox and n2o in the offgas from firing plants operated with nh3 for catalytic decomposition of nh330 Jul 2026US 2026/0216648 A1
- Discharge gas treatment method and discharge gas treatment device23 Jul 2026US 2026/0208102 A1Resonac Corporation
- Method for synthesizing high-value products from refinery furnace gas2 Jul 2026US 2026/0184580 A1Kunming University of Science and Technology
Most cited
By later US patents
- Low NO.sub.x cogeneration process and system39US 5,224,334 ARadian Corporation · 1993
- Exhaust gas cleaner and method for cleaning exhaust gas37US 5,882,607 AAgency of Industrial Science and Technology · 1999
- Compositions for abatement of volatile organic compounds and apparatus and methods using the same31US 6,319,484 B1Engelhard Corporation · 2001
- Process for selectively separating hydrogen, or both hydrogen and carbon monoxide from olefinic hydrocarbons26US 5,907,076 AExxon Chemical Patents Inc. · 1999
- Process and device for treating gas flows23US 6,096,278 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 2000