B01D 2251/50
Inorganic acids
B01D2251/50 (Inorganic acids) appears on 198 US grants and 244 published applications in this corpus.
Search patents in B01D- Granted patents
- 198
- Published applications
- 244
- Assignees
- 168
- Inventors
- 546
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 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 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 4 |
| 2006 | 1 | 1 |
| 2007 | 3 | 8 |
| 2008 | 5 | 11 |
| 2009 | 3 | 11 |
| 2010 | 11 | 13 |
| 2011 | 15 | 18 |
| 2012 | 7 | 9 |
| 2013 | 5 | 4 |
| 2014 | 7 | 8 |
| 2015 | 11 | 10 |
| 2016 | 5 | 11 |
| 2017 | 12 | 17 |
| 2018 | 10 | 19 |
| 2019 | 17 | 18 |
| 2020 | 13 | 8 |
| 2021 | 11 | 11 |
| 2022 | 19 | 23 |
| 2023 | 8 | 10 |
| 2024 | 7 | 8 |
| 2025 | 9 | 13 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Exhaust gas scrubber with energy integration14 Apr 2026US 12,599,871 B2thyssenkrupp AG
- Process for producing fertilizer from a biogas stream24 Mar 2026US 12,583,801 B2ThioSolv, LLC
- Metal sulfides on alkali earth particle substrates25 Nov 2025US 12,478,944 B2Atlas Carbon, LLC
- Liquid sorbent-enhanced ammonia production11 Nov 2025US 12,465,888 B1Alliance for Sustainable Energy, LLC
- Catalyst for catalytic oxidative cracking of hydrogen sulphide with concurrent hydrogen production4 Nov 2025US 12,459,810 B2Nextchem Tech S.P.A.
- Process and plant for a permanent storage of phosphogypsum14 May 2026US 2026/0132042 A1Metso Metals Oy
- Methods for using metal silicates for carbon sequestration9 Apr 2026US 2026/0097356 A1
- Complete conversion of sulfur dioxide to sulfuric acid by aqueous acid absorption19 Mar 2026US 2026/0077296 A1Saudi Arabian Oil Company
- Catalyst for catalytic oxidative cracking of hydrogen sulphide with concurrent hydrogen production5 Feb 2026US 2026/0035240 A1Nextchem Tech S.P.A.
- Contaminated air treatment29 Jan 2026US 2026/0027519 A1I/O Electrical & Mechanical Limited
Most cited
By later US patents
- Process for sulfur removal suitable for treating high-pressure gas streams77US 7,381,393 B2The Regents of the University of California · 2008
- Elimination of odors from waste material74US 4,405,354 AUniscope, Inc. · 1983
- Multi-component removal in flue gas by aqua ammonia63US 7,255,842 B1United States of America Department of Energy · 2007
- Method for controlling elemental mercury emissions47US 6,855,859 B2McDermott Technology, Inc. · 2005
- Method for producing chlorine dioxide using chemically impregnated zeolite46US 5,567,405 AKlatte Inc. · 1996