B01D 2257/502
Carbon monoxide
B01D2257/502 (Carbon monoxide) appears on 981 US grants and 1,241 published applications in this corpus.
Search patents in B01D- Granted patents
- 981
- Published applications
- 1,241
- Assignees
- 623
- Inventors
- 2,936
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 12 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 8 | 0 |
| 1992 | 11 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 9 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 11 | 0 |
| 2000 | 10 | 0 |
| 2001 | 11 | 3 |
| 2002 | 12 | 12 |
| 2003 | 21 | 23 |
| 2004 | 10 | 20 |
| 2005 | 12 | 20 |
| 2006 | 15 | 24 |
| 2007 | 10 | 25 |
| 2008 | 16 | 18 |
| 2009 | 15 | 50 |
| 2010 | 32 | 62 |
| 2011 | 38 | 61 |
| 2012 | 37 | 52 |
| 2013 | 45 | 44 |
| 2014 | 38 | 43 |
| 2015 | 44 | 49 |
| 2016 | 30 | 59 |
| 2017 | 44 | 56 |
| 2018 | 46 | 77 |
| 2019 | 48 | 61 |
| 2020 | 58 | 53 |
| 2021 | 45 | 57 |
| 2022 | 42 | 61 |
| 2023 | 58 | 78 |
| 2024 | 49 | 93 |
| 2025 | 51 | 81 |
| 2026 | 32 | 59 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Exhaust gas purification catalyst6 Oct 2026US 12,752,237 B2Cataler Corporation
- Analysis device and analysis method for quality index of natural gas product and application6 Oct 2026US 12,754,171 B2PetroChina Company Limited
- Method for manufacturing exhaust gas purification catalyst29 Sep 2026US 12,746,538 B2Cataler Corporation
- Analysis system and method for impurity components in perfluoropropane22 Sep 2026US 12,742,752 B2Lansis Instrument (Shanghai) Co., Ltd
- Catalyst reactor15 Sep 2026US 12,734,473 B2Taiyuan University of Technology
- Exhaust purification device8 Oct 2026US 2026/0307009 A1Mazda Motor Corporation
- System for treating an exhaust gas8 Oct 2026US 2026/0307052 A1Johnson Matthey Public Limited Company
- Combination carbon monoxide and nitrogen dioxide scrubber treatment and process17 Sep 2026US 2026/0273461 A1
- Catalyst article for treating exhaust gas, its method of manufacture and uses thereof10 Sep 2026US 2026/0264015 A1Johnson Matthey Public Limited Company
- Catalyst article for treating exhaust gas, its method of manufacture and uses thereof10 Sep 2026US 2026/0264058 A1Johnson Matthey Public Limited Company
Most cited
By later US patents
- Selective adsorption process139US 3,986,849 AUnion Carbide Corporation · 1976
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator136US 5,979,440 ASeQual Technologies, Inc. · 1999
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator133US 6,698,423 B1SeQual Technologies, Inc. · 2004
- Extraction and concentration of a gas component117US 5,082,473 A1992
- Thermally insulative smoking article filter components111US 7,878,209 B2Philip Morris USA Inc. · 2011