B01D 2257/304
Hydrogen sulfide
B01D2257/304 (Hydrogen sulfide) appears on 1,498 US grants and 1,956 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,498
- Published applications
- 1,956
- Assignees
- 795
- Inventors
- 3,833
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 5 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 8 | 0 |
| 1996 | 6 | 0 |
| 1997 | 14 | 0 |
| 1998 | 9 | 0 |
| 1999 | 10 | 0 |
| 2000 | 11 | 0 |
| 2001 | 13 | 3 |
| 2002 | 11 | 17 |
| 2003 | 13 | 15 |
| 2004 | 8 | 12 |
| 2005 | 9 | 27 |
| 2006 | 12 | 24 |
| 2007 | 17 | 24 |
| 2008 | 12 | 46 |
| 2009 | 20 | 49 |
| 2010 | 33 | 95 |
| 2011 | 30 | 92 |
| 2012 | 51 | 111 |
| 2013 | 96 | 93 |
| 2014 | 90 | 98 |
| 2015 | 61 | 76 |
| 2016 | 61 | 126 |
| 2017 | 93 | 110 |
| 2018 | 95 | 129 |
| 2019 | 118 | 134 |
| 2020 | 97 | 100 |
| 2021 | 69 | 99 |
| 2022 | 90 | 87 |
| 2023 | 75 | 91 |
| 2024 | 86 | 122 |
| 2025 | 78 | 102 |
| 2026 | 51 | 74 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Use of silica nanoparticles with triazine for H2S scavenging6 Oct 2026US 12,752,236 B2Nissan Chemical America Corporation
- Produced water degassing using ejector6 Oct 2026US 12,753,686 B1Saudi Arabian Oil Company
- System and method of treatment of gas contaminated with hydrogen sulfide and the reduction of hydrogen sulfide associated odor29 Sep 2026US 12,746,506 B2Streamline Innovations Inc
- Photocatalyst filter and electronic device comprising same15 Sep 2026US 12,734,266 B2Samsung Electronics Co., Ltd.
- Gas sorption system8 Sep 2026US 12,728,384 B2Munters Europe Aktiebolag
- Composite amine absorption liquid1 Oct 2026US 2026/0295512 A1Mitsubishi Heavy Industries, Ltd.
- Conditioning wet sour gas via integrated desulfurization and dehydration24 Sep 2026US 2026/0284582 A1Merichem Technologies, LLC
- Hydrogen sulphide and mercaptan scavenging additive concentrate comprising an oxazolidine compound and an alkoxylated amine24 Sep 2026US 2026/0284585 A1TotalEnergies One Tech
- Cleaning of co2 containing feed gases24 Sep 2026US 2026/0285690 A1Topsoe A/S
- Comprehensive energy supply system with hydrogen production and prediction function and integrated with hydrogen energy storage by residual flue gas of gas engine24 Sep 2026US 2026/0286916 A1The Architectural Design & Research Institute of Zhejiang University Co., Ltd.
Most cited
By later US patents
- Microcomponent assembly for efficient contacting of fluid191US 6,126,723 ABattelle Memorial Institute · 2000
- 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
- Method and apparatus for treating a sour gas146US 8,206,669 B2Air Products and Chemicals, Inc. · 2012
- Separation of a sour syngas stream136US 8,268,044 B2Air Products and Chemicals, Inc. · 2012
- Method of treating sour gas and liquid hydrocarbon135US 5,744,024 ANalco/Exxon Energy Chemicals, L. P. · 1998