B01J 2231/48
Ring-opening reactions
B01J2231/48 (Ring-opening reactions) appears on 109 US grants and 84 published applications in this corpus.
Search patents in B01J- Granted patents
- 109
- Published applications
- 84
- Assignees
- 80
- Inventors
- 310
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 6 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 2 |
| 2002 | 11 | 5 |
| 2003 | 5 | 9 |
| 2004 | 7 | 3 |
| 2005 | 4 | 4 |
| 2006 | 2 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 2 | 3 |
| 2010 | 4 | 4 |
| 2011 | 3 | 2 |
| 2012 | 1 | 1 |
| 2013 | 4 | 2 |
| 2014 | 2 | 3 |
| 2015 | 1 | 3 |
| 2016 | 2 | 2 |
| 2017 | 1 | 3 |
| 2018 | 2 | 4 |
| 2019 | 5 | 5 |
| 2020 | 3 | 5 |
| 2021 | 3 | 6 |
| 2022 | 0 | 1 |
| 2023 | 3 | 4 |
| 2024 | 1 | 2 |
| 2025 | 2 | 4 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for carrying out reaction of isatin compound and cyclopropenone compound at low catalytic amount22 Sep 2026US 12,741,972 B2Soochow University
- Non-metal catalyst for synthesizing polycarbonate by CO2 and preparation method therefor31 Mar 2026US 12,589,384 B2Wuhan Institute of Technology
- Compositions comprising romp catalyst and dispersant, cartridges, and methods7 Oct 2025US 12,435,163 B23M Innovative Properties Company
- Nanocage-confined catalyst, preparation process and use thereof4 Feb 2025US 12,214,339 B2China Petroleum & Chemical Corporation
- Strongly Lewis acidic metal-organic frameworks for continuous flow catalysis23 Jul 2024US 12,042,788 B2The University of Chicago
- Catalysts and processes for stereoselective ring-opening polymerization23 Apr 2026US 2026/0108869 A1Technische Universität München
- Catalyst for polyester depolymerization or cyclic ester synthesis, preparation method therefor and use thereof23 Oct 2025US 2025/0325970 A1Sichuan University
- Diroximel fumarate synthesis18 Sep 2025US 2025/0289784 A1Biogen MA Inc.
- Palladium precatalyst embodiments for enantioselective chemical reactions and methods of making and using the same15 May 2025US 2025/0153157 A1
- Binuclear schiff base-cobalt complex, preparation method and use thereof27 Mar 2025US 2025/0101054 A1Changchun Institute of Applied Chemistry Chinese Academy of Sciences
Most cited
By later US patents
- Recyclable metathesis catalysts82US 6,921,735 B2The Trustees of Boston College · 2005
- Process for the production of acid anhydrides from epoxides43US 9,403,788 B2Novomer, Inc. · 2016
- Olefin metathesis catalysts and related methods39US 7,932,397 B2Massachusetts Institute of Technology · 2011
- Method for production of alkylene oxide polymers37US 5,326,852 ASumitomo Seika Chemicals Co., Ltd. · 1994
- Process for preparing nonionic surfactants-oxyalkylation with calcium and/or strontium catalysts36US 4,453,022 AUnion Carbide Corporation · 1984