Y02P 20/584
Recycling of catalysts
Y02P20/584 (Recycling of catalysts) appears on 2,641 US grants and 1,834 published applications in this corpus.
Search patents in Y02P- Granted patents
- 2,641
- Published applications
- 1,834
- Assignees
- 988
- Inventors
- 6,185
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 45 | 0 |
| 1977 | 39 | 0 |
| 1978 | 51 | 0 |
| 1979 | 20 | 0 |
| 1980 | 49 | 0 |
| 1981 | 42 | 0 |
| 1982 | 45 | 0 |
| 1983 | 52 | 0 |
| 1984 | 51 | 0 |
| 1985 | 47 | 0 |
| 1986 | 43 | 0 |
| 1987 | 22 | 0 |
| 1988 | 31 | 0 |
| 1989 | 41 | 0 |
| 1990 | 45 | 0 |
| 1991 | 45 | 0 |
| 1992 | 43 | 0 |
| 1993 | 40 | 0 |
| 1994 | 45 | 0 |
| 1995 | 60 | 0 |
| 1996 | 37 | 0 |
| 1997 | 41 | 0 |
| 1998 | 90 | 0 |
| 1999 | 55 | 0 |
| 2000 | 58 | 0 |
| 2001 | 54 | 14 |
| 2002 | 54 | 60 |
| 2003 | 63 | 74 |
| 2004 | 51 | 98 |
| 2005 | 59 | 61 |
| 2006 | 48 | 66 |
| 2007 | 45 | 76 |
| 2008 | 42 | 63 |
| 2009 | 44 | 75 |
| 2010 | 58 | 107 |
| 2011 | 59 | 100 |
| 2012 | 53 | 81 |
| 2013 | 65 | 114 |
| 2014 | 102 | 97 |
| 2015 | 97 | 79 |
| 2016 | 69 | 94 |
| 2017 | 79 | 100 |
| 2018 | 86 | 79 |
| 2019 | 79 | 77 |
| 2020 | 63 | 62 |
| 2021 | 57 | 49 |
| 2022 | 36 | 61 |
| 2023 | 40 | 63 |
| 2024 | 51 | 57 |
| 2025 | 28 | 21 |
| 2026 | 22 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Catalyst for hydrogen peroxide synthesis and regeneration25 Aug 2026US 12,714,987 B2Heesung Catalysts Corporation
- Reaction apparatus and production process for olefin production16 Jun 2026US 12,655,076 B2Sogang University Research & Business Development Foundation
- Resource-oriented utilization method for high-salt salt mud containing sodium chloride and sodium sulfate19 May 2026US 12,630,453 B2Dongjiang Enviromental Company Limited
- Solid-acid catalyzed paraffin alkylation with rare earth-modified molecular sieve adsorbents19 May 2026US 12,630,489 B2Exelus, Inc.
- Catalyst system for producing aromatic amines5 May 2026US 12,616,960 B2BASF SE
- Method for producing diamine containing cyclohexane ring23 Jul 2026US 2026/0209168 A1Mitsubishi Gas Chemical Company, Inc.
- Integrated multi-unit method for co-production of 2,5-diformylfuran and 2,5-furandicarboxylic acid based on biphasic solvent system16 Jul 2026US 2026/0200883 A1Dalian University of Technology
- Tocopherol derivative, preparation method therefor, and use thereof4 Jun 2026US 2026/0152477 A1Shanghai Coachchem Technology Co., Ltd.
- Morpholine-based organophosphine ligand, preparation method therefor and application thereof28 May 2026US 2026/0146056 A1Henan academy of sciences
- Mechanocatalytic depolymerization of plastics21 May 2026US 2026/0139117 A1Georgia Tech Research Corporation
Most cited
By later US patents
- Diluent slip stream to give catalyst wetting agent491US 6,262,191 B1Phillips Petroleum Company · 2001
- Method and apparatus for producing carbon nanotubes180US 6,413,487 B1The Board of Regents of the University of Oklahoma · 2002
- Process for the manufacture of cycloalkyldimethanol147US 6,294,703 B1Mitsubishi Chemical Corporation · 2001
- Fast-fluidized bed reactor for MTO process143US 6,166,282 AUop LLC · 2000
- Extraction process for removal of impurities from terephthalic acid filtrate142US 4,939,297 AEastman Kodak Company · 1990