B01D 53/52
Hydrogen sulfide
B01D53/52 (Hydrogen sulfide) appears on 1,029 US grants and 811 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,029
- Published applications
- 811
- Assignees
- 546
- Inventors
- 2,128
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 23 | 0 |
| 1977 | 19 | 0 |
| 1978 | 16 | 0 |
| 1979 | 10 | 0 |
| 1980 | 11 | 0 |
| 1981 | 18 | 0 |
| 1982 | 18 | 0 |
| 1983 | 14 | 0 |
| 1984 | 15 | 0 |
| 1985 | 17 | 0 |
| 1986 | 13 | 0 |
| 1987 | 7 | 0 |
| 1988 | 12 | 0 |
| 1989 | 19 | 0 |
| 1990 | 21 | 0 |
| 1991 | 7 | 0 |
| 1992 | 18 | 0 |
| 1993 | 16 | 0 |
| 1994 | 22 | 0 |
| 1995 | 20 | 0 |
| 1996 | 25 | 0 |
| 1997 | 16 | 0 |
| 1998 | 15 | 0 |
| 1999 | 17 | 0 |
| 2000 | 15 | 0 |
| 2001 | 14 | 2 |
| 2002 | 11 | 12 |
| 2003 | 16 | 10 |
| 2004 | 4 | 9 |
| 2005 | 6 | 8 |
| 2006 | 6 | 12 |
| 2007 | 5 | 13 |
| 2008 | 5 | 19 |
| 2009 | 8 | 17 |
| 2010 | 18 | 28 |
| 2011 | 15 | 37 |
| 2012 | 13 | 39 |
| 2013 | 27 | 25 |
| 2014 | 32 | 49 |
| 2015 | 32 | 36 |
| 2016 | 29 | 35 |
| 2017 | 35 | 35 |
| 2018 | 25 | 59 |
| 2019 | 51 | 53 |
| 2020 | 46 | 47 |
| 2021 | 38 | 50 |
| 2022 | 45 | 37 |
| 2023 | 42 | 40 |
| 2024 | 36 | 63 |
| 2025 | 45 | 45 |
| 2026 | 21 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Use of silica nanoparticles with triazine for H2S scavenging6 Oct 2026US 12,752,236 B2Nissan Chemical America Corporation
- 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
- Steel mill offgas separation and purification18 Aug 2026US 12,708,874 B2Air Products and Chemicals, Inc.
- Use of melamine cyanurate nanoparticles and silica nanoparticles for H2S scavenging23 Jun 2026US 12,661,615 B2Nissan Chemical America Corporation
- Intelligent treatment device for downhole gas invasion while drilling16 Jun 2026US 12,654,129 B1Chengdu University of Technology
- 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
- Compositions and methods for carbon dioxide capture and fluid sweetening10 Sep 2026US 2026/0263993 A1Solugen, Inc.
- Rotary-bed device10 Sep 2026US 2026/0263995 A1Ifp Energies Nouvelles
- Rotary bed device10 Sep 2026US 2026/0263996 A1Ifp Energies Nouvelles
Most cited
By later US patents
- Solid sorbents for removal of carbon dioxide from gas streams at low temperatures119US 6,908,497 B1The United States of America as represented by the Department of Energy · 2005
- Process for removing hydrogen sulfide and mercury from gases118US 4,786,483 AMobil Oil Corporation · 1988
- Mixtures of hexahydrotriazines useful as H.sub.2 S scavengers115US 5,347,004 ABaker Hughes Incorporated · 1994
- Hydrogen sulfide scavenging process105US 5,462,721 ACrescent Holdings Limited · 1995
- Method of scavenging hydrogen sulfide104US 4,680,127 ABetz Laboratories, Inc. · 1987