C09K 2208/20
Hydrogen sulfide elimination
C09K2208/20 (Hydrogen sulfide elimination) appears on 288 US grants and 387 published applications in this corpus.
Search patents in C09K- Granted patents
- 288
- Published applications
- 387
- Assignees
- 126
- Inventors
- 685
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 6 |
| 2004 | 2 | 1 |
| 2005 | 2 | 5 |
| 2006 | 1 | 2 |
| 2007 | 2 | 0 |
| 2008 | 4 | 3 |
| 2009 | 3 | 4 |
| 2010 | 2 | 7 |
| 2011 | 3 | 4 |
| 2012 | 3 | 13 |
| 2013 | 6 | 9 |
| 2014 | 4 | 11 |
| 2015 | 4 | 14 |
| 2016 | 6 | 30 |
| 2017 | 14 | 43 |
| 2018 | 22 | 48 |
| 2019 | 31 | 32 |
| 2020 | 37 | 35 |
| 2021 | 23 | 21 |
| 2022 | 25 | 14 |
| 2023 | 26 | 26 |
| 2024 | 27 | 28 |
| 2025 | 25 | 19 |
| 2026 | 6 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Corrosion inhibition compositions and methods of use in sour environments6 Oct 2026US 12,753,338 B2King Fahd University of Petroleum and Minerals
- Systems and methods for wellbore drilling utilizing a thermochemical sulfate reduction (TSR) proxy25 Aug 2026US 12,716,349 B2Saudi Arabian Oil Company
- Systems and methods for scavenging sulfur-containing materials using a precursor scavenger material28 Jul 2026US 12,692,427 B2Cameron International Corporation
- Method of scavenging hydrogen sulfide from sour gas well using mineral oil nanoemulsions23 Jun 2026US 12,662,619 B1King Fahd University of Petroleum and Minerals
- Compositions and methods for the dissolution of iron sulfide12 May 2026US 12,624,276 B2Solugen, Inc.
- Compositions and methods of removing iron sulfide scales from low pressure gas wells30 Jul 2026US 2026/0218037 A1Saudi Arabian Oil Company
- Mercaptan scavenger additives4 Jun 2026US 2026/0152695 A1Cameron International Corporation
- Simultaneous control of scale, corrosion, and hydrogen sulfide-related issues using a single product14 May 2026US 2026/0132062 A1ChampionX LLC
- Methods of Producing Compositions Comprising Hydrophilic Sophorolipids7 May 2026US 2026/0125729 A1Locus Solutions Ipco, LLC
- Sustained-release scale inhibitors19 Mar 2026US 2026/0078296 A1Materials Engineering and Technical Support Services
Most cited
By later US patents
- Apparatus for on-site production of nitrate ions409US 7,514,058 B1The Lata Group, Inc. · 2009
- Composition and method for sweetening hydrocarbons161US 4,978,512 AQuaker Chemical Corporation · 1990
- Method of treating sour gas and liquid hydrocarbon160US 5,674,377 ANalco/Exxon Energy Chemicals, L. P. · 1997
- Mixtures of hexahydrotriazines useful as H.sub.2 S scavengers115US 5,347,004 ABaker Hughes Incorporated · 1994
- Composition and process for well cleaning112US 7,380,606 B2CESI Chemical, a Flotek Company · 2008