B01J 2531/0288
Sterically demanding or shielding ligands
B01J2531/0288 (Sterically demanding or shielding ligands) appears on 63 US grants and 70 published applications in this corpus.
Search patents in B01J- Granted patents
- 63
- Published applications
- 70
- Assignees
- 69
- Inventors
- 204
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 3 |
| 2003 | 1 | 1 |
| 2004 | 2 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 3 |
| 2012 | 1 | 3 |
| 2013 | 2 | 3 |
| 2014 | 2 | 3 |
| 2015 | 3 | 4 |
| 2016 | 5 | 4 |
| 2017 | 2 | 1 |
| 2018 | 1 | 3 |
| 2019 | 4 | 6 |
| 2020 | 4 | 4 |
| 2021 | 3 | 4 |
| 2022 | 6 | 2 |
| 2023 | 4 | 8 |
| 2024 | 3 | 4 |
| 2025 | 1 | 8 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Access to chiral bisphenol (BPOL) ligands through desymmetrizing asymmetric ortho-selective mono-halogenation26 May 2026US 12,637,403 B2The Chinese University of Hong Kong
- Ruthenium complexes, methods of their preparation and application thereof in olefin cross metathesis12 May 2026US 12,624,060 B2Apeiron Synthesis S. A.
- Tri-(adamantyl) phosphines and applications thereof3 Feb 2026US 12,539,508 B2The Trustees of Princeton University
- Cyclopentadienyl/adamantyl phosphinimine zirconium and hafnium complexes2 Dec 2025US 12,486,342 B2NOVA Chemicals (International) S.A.
- Optically pure enantiomers of ruthenium complexes and uses thereof17 Dec 2024US 12,168,224 B2Centre National De La Recherche Scientifique
- Tri-(adamantyl)phosphines and applications thereof16 Apr 2026US 2026/0102762 A1The Trustees of Princeton University
- Novel ruthenium complexes, method of their synthesis, intermediate compounds used in this method, method of their synthesis and use of novel ruthenium complexes in olefin metathesis reactions2 Apr 2026US 2026/0092080 A1Uniwersytet Warszawski
- Process for preparing double metal cyanide catalysts27 Nov 2025US 2025/0360495 A1Covestro Deutschland AG
- Multidentate phosphite ligands, catalytic compositions containing such ligands, and catalytic processes utilizing such catalytic compositions25 Sep 2025US 2025/0296076 A1INV Nylon Chemicals Americas, LLC
- Multidentate phosphite ligands, catalytic compositions containing such ligands, and catalytic processes utilizing such catalytic compositions25 Sep 2025US 2025/0296945 A1INV Nylon Chemicals Americas, LLC
Most cited
By later US patents
- Catalyst system of enhanced productivity544US 5,153,157 AExxon Chemical Patents Inc. · 1992
- Polymerization process for producing easier processing polymers69US 6,339,134 B12002
- Hydroformylation process52US 4,169,861 ACelanese Corporation · 1979
- Stabilization of phosphite ligands in hydroformylation process33US 5,929,289 AUnion Carbide Chemicals & Plastics Technology Corporation · 1999
- Metal complexes useful in metathesis and other reactions28US 7,687,635 B2Telene S.A.S. · 2010