B01D 2251/506
Sulfuric acid
B01D2251/506 (Sulfuric acid) appears on 66 US grants and 81 published applications in this corpus.
Search patents in B01D- Granted patents
- 66
- Published applications
- 81
- Assignees
- 69
- Inventors
- 206
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 2 | 4 |
| 2008 | 0 | 4 |
| 2009 | 0 | 2 |
| 2010 | 1 | 0 |
| 2011 | 1 | 5 |
| 2012 | 0 | 4 |
| 2013 | 3 | 3 |
| 2014 | 2 | 4 |
| 2015 | 5 | 2 |
| 2016 | 2 | 3 |
| 2017 | 3 | 8 |
| 2018 | 3 | 4 |
| 2019 | 6 | 10 |
| 2020 | 6 | 1 |
| 2021 | 5 | 4 |
| 2022 | 7 | 9 |
| 2023 | 3 | 3 |
| 2024 | 5 | 2 |
| 2025 | 5 | 7 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Exhaust gas scrubber with energy integration14 Apr 2026US 12,599,871 B2thyssenkrupp AG
- Process for eliminating hydrogen sulfide in an ammonium sulfate solution14 Oct 2025US 12,440,806 B2ThioSolv, LLC
- Hydrogen chloride dehydration method2 Sep 2025US 12,404,172 B2Tokuyama Corporation
- Kraft pulping foul condensate treatment process and apparatus15 Jul 2025US 12,358,813 B2Noram Engineering and Constructors Ltd.
- Method for removing ammonia from non-condensable gases of a pulp mill14 Jan 2025US 12,195,917 B2Valmet Technologies Oy
- Process and plant for a permanent storage of phosphogypsum14 May 2026US 2026/0132042 A1Metso Metals Oy
- Complete conversion of sulfur dioxide to sulfuric acid by aqueous acid absorption19 Mar 2026US 2026/0077296 A1Saudi Arabian Oil Company
- Systems for removing carbon dioxide from a carbon dioxide containing gas, and related methods11 Dec 2025US 2025/0375729 A1Schlumberger Technology Corporation
- Carbon dioxide-separating apparatus and carbon dioxide capture and storage system16 Oct 2025US 2025/0319434 A1Korea University Research and Business Foundation
- Tail gas treatment system and method for a sulfuric acid production plant9 Oct 2025US 2025/0313468 A1Chemetics Inc.
Most cited
By later US patents
- Elimination of odors from waste material74US 4,405,354 AUniscope, Inc. · 1983
- Storing substrates between process steps within a processing facility43US 5,833,726 AExtraction System, Inc. · 1998
- Ammonium/ammonia removal from a stream25US 7,270,796 B2CASTion Corporation · 2007
- Process for scrubbing ammonia from acid gases comprising ammonia and hydrogen sulfide23US 7,258,848 B1E. I. Du Pont de Nemours and Company · 2007
- Control of emissions14US 8,425,866 B2The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 2013