B01J 31/40
Regeneration or reactivation
B01J31/40 (Regeneration or reactivation) appears on 664 US grants and 329 published applications in this corpus.
Search patents in B01J- Granted patents
- 664
- Published applications
- 329
- Assignees
- 278
- Inventors
- 1,404
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 15 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 14 | 0 |
| 1981 | 18 | 0 |
| 1982 | 17 | 0 |
| 1983 | 17 | 0 |
| 1984 | 11 | 0 |
| 1985 | 12 | 0 |
| 1986 | 13 | 0 |
| 1987 | 6 | 0 |
| 1988 | 8 | 0 |
| 1989 | 16 | 0 |
| 1990 | 13 | 0 |
| 1991 | 9 | 0 |
| 1992 | 18 | 0 |
| 1993 | 15 | 0 |
| 1994 | 17 | 0 |
| 1995 | 25 | 0 |
| 1996 | 16 | 0 |
| 1997 | 20 | 0 |
| 1998 | 44 | 0 |
| 1999 | 22 | 0 |
| 2000 | 21 | 0 |
| 2001 | 11 | 3 |
| 2002 | 13 | 12 |
| 2003 | 12 | 21 |
| 2004 | 15 | 25 |
| 2005 | 13 | 17 |
| 2006 | 12 | 11 |
| 2007 | 9 | 22 |
| 2008 | 6 | 6 |
| 2009 | 4 | 12 |
| 2010 | 20 | 29 |
| 2011 | 17 | 17 |
| 2012 | 13 | 18 |
| 2013 | 15 | 9 |
| 2014 | 14 | 6 |
| 2015 | 13 | 16 |
| 2016 | 9 | 15 |
| 2017 | 10 | 11 |
| 2018 | 13 | 15 |
| 2019 | 8 | 13 |
| 2020 | 10 | 7 |
| 2021 | 11 | 5 |
| 2022 | 1 | 9 |
| 2023 | 8 | 10 |
| 2024 | 4 | 10 |
| 2025 | 8 | 6 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for preparing enantiomerically enriched substituted pyrrolo[2,3-d]pyrimidines2 Jun 2026US 12,643,902 B2Sun Pharmaceutical Industries Limited
- Non-metal catalyst for synthesizing polycarbonate by CO2 and preparation method therefor31 Mar 2026US 12,589,384 B2Wuhan Institute of Technology
- Iron removal from carbon nanotubes and metal catalyst recycle25 Nov 2025US 12,479,729 B2Nanocomp Technologies, Inc.
- Method for carbon dioxide fixation using a palladium-doped nitrogen-rich organic framework catalyst30 Sep 2025US 12,427,506 B1King Fahd University of Petroleum and Minerals
- Process for recovering and reusing depolymerization catalyst16 Sep 2025US 12,415,179 B29449710 Canada Inc.
- Recycling of homogeneous palladium catalyst3 Sep 2026US 2026/0257214 A1Firmenich SA
- Compositions and methods for mitigating aggregation of and recycling of nanoscale catalysts20 Aug 2026US 2026/0241374 A1Massachusetts Institute of Technology
- Methoxypyridyl ligands and use thereof in alkoxycarbonylation18 Jun 2026US 2026/0166539 A1Evonik Oxeno GmbH
- Catalyst for depolymerizing polycarbonate-based resin, and decomposition method of polycarbonate-based resin, recovery method of catalyst for depolymerizing polycarbonate-based resin using the same5 Feb 2026US 2026/0034539 A1Korea University Research and Business Foundation
- Method for recovering platinum group element3 Jul 2025US 2025/0215525 A1Zeon Corporation
Most cited
By later US patents
- Method of recovering in active form the catalyst for the terephthalic acid synthesis117US 4,356,319 AMontedison S.p.A. · 1982
- Colloidal size hydrophobic polymers particulate having discrete particles of an inorganic material dispersed therein112US 4,421,660 AThe Dow Chemical Company · 1983
- Process for separating zero-valent nickel species from divalent nickel species97US 4,387,056 AE. I. Du Pont de Nemours and Company · 1983
- Recyclable metathesis catalysts82US 6,921,735 B2The Trustees of Boston College · 2005
- Process for improving productivity of a carbonylation catalyst solution by removing corrosion metals77US 5,731,252 AHoechst Celanese Corporation · 1998