B01D 2255/202
Alkali metals
B01D2255/202 (Alkali metals) appears on 365 US grants and 429 published applications in this corpus.
Search patents in B01D- Granted patents
- 365
- Published applications
- 429
- Assignees
- 225
- Inventors
- 1,129
- Latest grant
- 6 Oct 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 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 9 | 0 |
| 1999 | 10 | 0 |
| 2000 | 15 | 0 |
| 2001 | 7 | 7 |
| 2002 | 9 | 15 |
| 2003 | 12 | 14 |
| 2004 | 12 | 15 |
| 2005 | 10 | 13 |
| 2006 | 8 | 16 |
| 2007 | 5 | 7 |
| 2008 | 6 | 12 |
| 2009 | 5 | 26 |
| 2010 | 13 | 36 |
| 2011 | 13 | 29 |
| 2012 | 21 | 21 |
| 2013 | 22 | 21 |
| 2014 | 21 | 15 |
| 2015 | 13 | 18 |
| 2016 | 16 | 17 |
| 2017 | 16 | 24 |
| 2018 | 15 | 24 |
| 2019 | 25 | 21 |
| 2020 | 14 | 13 |
| 2021 | 13 | 15 |
| 2022 | 14 | 14 |
| 2023 | 5 | 14 |
| 2024 | 9 | 11 |
| 2025 | 10 | 6 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Complex oxides for reactive oxygen separation and related applications6 Oct 2026US 12,752,260 B2North Carolina State University
- Method for reducing risk of burning and explosion in deoxygenation process of oxygen-containing gas21 Apr 2026US 12,606,505 B2China Petroleum & Chemical Corporation
- Method for manufacturing catalyst for capture and conversion of carbon dioxide10 Mar 2026US 12,569,836 B2Lowcarbon Co., Ltd.
- Pillar-shaped honeycomb structure and method for manufacturing same20 Jan 2026US 12,528,746 B2NGK Insulators, Ltd.
- Exhaust gas emissions abatement system13 Jan 2026US 12,521,696 B2Shell USA, Inc.
- Improved hydrocarbon trap for cold-start hydrocarbon control from internal combustion engines1 Oct 2026US 2026/0295527 A1
- Exhaust Gas Purification Catalyst23 Jul 2026US 2026/0208107 A1Cataler Corporation
- Multimetallic oxides for thermally reversible nox sorption9 Jul 2026US 2026/0192249 A1The Johns Hopkins University
- Catalyst for Exhaust Gas Purification9 Apr 2026US 2026/0097363 A1Cataler Corporation
- Biogas halogen processing systems and methods12 Mar 2026US 2026/0070018 A1Stearns, Conrad and Schmidt, Consulting Engineers, Inc.
Most cited
By later US patents
- Monomodal and polymodal catalyst supports and catalysts having narrow pore size distributions and their production129US 5,935,897 ABASF SE · 1999
- Catalytic wall-flow filter103US 6,753,294 B1Johnson Matthey Public Limited Company · 2004
- Multi-zoned catalytic trap and methods of making and using the same88US 6,375,910 B1Engelhard Corporation · 2002
- Lean-burn nox catalyst/nox trap system83US 5,727,385 AFord Global Technologies, LLC · 1998
- Exhaust gas purifying catalyst and manufacturing method thereof65US 7,851,405 B2Nissan Motor Co., Ltd. · 2010