C01B 17/56
Separation
Official title: Separation; Purification
C01B17/56 (Separation) appears on 30 US grants and 18 published applications in this corpus.
Search patents in C01B- Granted patents
- 30
- Published applications
- 18
- Assignees
- 29
- Inventors
- 93
- Latest grant
- 25 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 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 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 4 | 5 |
| 2020 | 3 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 4 |
| 2024 | 1 | 0 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Molecular sieve complex, composite material and application thereof25 Feb 2025US 12,233,396 B2China Petroleum & Chemical Corporation
- Composite material and use thereof in desulfurization25 Feb 2025US 12,233,397 B2China Petroleum & Chemical Corporation
- Improving sulfur recovery operations with processes based on novel CO2 over SO2 selective membranes and its combinations with SO2 over CO2 selective membranes25 Jun 2024US 12,017,180 B2Membrane Technology and Research, Inc.
- Integrated method for producing sulphur dioxide quality suitable for a sulphuric acid process from calcium sulphate/phosphogypsum from phosphoric acid production19 Dec 2023US 11,845,657 B2thyssenkrupp AG
- Method for cleaning viscose production off-gases and catalysts for use in the method14 Dec 2021US 11,198,093 B2Haldor TopsøE A/S
- Sulfur dioxide mixture-filled container and sulfur dioxide composition1 Oct 2026US 2026/0298410 A1Sumitomo Seika Chemicals Co., Ltd.
- Steam sulfurous material reforming and thermochemical cycles related thereto16 Oct 2025US 2025/0320118 A1Peregrine Hydrogen Inc.
- Molecular sieve complex, composite material and application thereof18 May 2023US 2023/0149891 A1China Petroleum & Chemical Corporation
- Composite material and use thereof in desulfurization18 May 2023US 2023/0149892 A1China Petroleum & Chemical Corporation
- Integrated method for producing sulphur dioxide quality suitable for a sulphuric acid process from calcium sulphate/phosphogypsum from phosphoric acid production27 Apr 2023US 2023/0126633 A1thyssenkrupp AG
Most cited
By later US patents
- Process for purifying sulfur oxides-containing gas36US 5,756,058 ASumitomo Heavy Industries, Ltd. · 1998
- Method of and apparatus for processing sulfur-containing exhaust gas32US 4,194,889 AMetallgesellschaft Aktiengesellschaft · 1980
- Method for removal of mercury in sulfur dioxide-containing gas15US 3,961,031 ANippon Mining Co., Ltd. · 1976
- Process for dehydrating gas with sulfuric acid15US 4,023,938 ABayer Aktiengesellschaft · 1977
- Process of manufacture of phosphoric acid with recovery of co-products14US 4,312,842 A1982