B01J 31/2282
Unsaturated compounds used as ligands
Official title: {Unsaturated compounds used as ligands}
B01J31/2282 (Unsaturated compounds used as ligands) appears on 1,442 US grants and 1,201 published applications in this corpus.
Search patents in B01J- Granted patents
- 1,442
- Published applications
- 1,201
- Assignees
- 625
- Inventors
- 3,089
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 13 | 0 |
| 1978 | 13 | 0 |
| 1979 | 13 | 0 |
| 1980 | 15 | 0 |
| 1981 | 20 | 0 |
| 1982 | 10 | 0 |
| 1983 | 10 | 0 |
| 1984 | 11 | 0 |
| 1985 | 10 | 0 |
| 1986 | 4 | 0 |
| 1987 | 10 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 8 | 0 |
| 1991 | 9 | 0 |
| 1992 | 18 | 0 |
| 1993 | 18 | 0 |
| 1994 | 16 | 0 |
| 1995 | 30 | 0 |
| 1996 | 27 | 0 |
| 1997 | 23 | 0 |
| 1998 | 29 | 0 |
| 1999 | 43 | 0 |
| 2000 | 46 | 0 |
| 2001 | 68 | 14 |
| 2002 | 61 | 44 |
| 2003 | 44 | 42 |
| 2004 | 33 | 43 |
| 2005 | 46 | 52 |
| 2006 | 25 | 25 |
| 2007 | 28 | 25 |
| 2008 | 18 | 30 |
| 2009 | 21 | 27 |
| 2010 | 19 | 46 |
| 2011 | 29 | 31 |
| 2012 | 17 | 35 |
| 2013 | 38 | 69 |
| 2014 | 31 | 67 |
| 2015 | 61 | 92 |
| 2016 | 67 | 78 |
| 2017 | 69 | 72 |
| 2018 | 55 | 54 |
| 2019 | 57 | 77 |
| 2020 | 51 | 45 |
| 2021 | 47 | 49 |
| 2022 | 37 | 41 |
| 2023 | 28 | 36 |
| 2024 | 38 | 46 |
| 2025 | 22 | 37 |
| 2026 | 16 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Internal diene compounds and their Pt complexes for catalyzed reactions including hydrosilylation29 Sep 2026US 12,746,537 B2
- Methods for preparing (2S,3R,4R)-4,5-dihydroxyisoleucine derivative and intermediates thereof15 Sep 2026US 12,735,384 B2Inner Mongolia Duhe Innovation R & D Tech Co., Ltd
- Catalyst, method of preparation, and methods involving hydrosilylation14 Jul 2026US 12,679,916 B2The Board of Trustees of the University of Illinois
- Hydrogen storage based on aqueous formate- bicarbonate (hydrogen carbonate) equilibrium9 Jun 2026US 12,649,654 B2Hydrogen Revolution Hungary Kft.
- Enantioselective hydrogenation of 4-substituted 1,2-dihydroquinolines in presence of a chiral iridium catalyst2 Jun 2026US 12,643,860 B2Bayer Aktiengesellschaft
- Selective olefin oligomerization with transition metal amine bis(phenolate) catalysts8 Oct 2026US 2026/0308083 A1Chevron Phillips Chemical Company LP
- Asymmetrical hafnium metallocenes10 Sep 2026US 2026/0265283 A1Dow Global Technologies LLC
- Symmetrical hafnium metallocene for making polymers with broad-orthogonal composition distributions10 Sep 2026US 2026/0265284 A1Dow Global Technologies LLC
- Intermolecular cyclopropanation of unsaturated hydrocarbons20 Aug 2026US 2026/0242327 A1The Penn State Research Foundation
- Regio-controllable [2+2] benzannulation with two adjacent c(sp3)-h bonds20 Aug 2026US 2026/0242341 A1The Scripps Research Institute
Most cited
By later US patents
- Catalyst system of enhanced productivity544US 5,153,157 AExxon Chemical Patents Inc. · 1992
- Compositions that can produce polymers334US 6,300,271 B1Phillips Petroleum Company · 2001
- Organometal catalyst compositions329US 6,355,594 B1Phillips Petroleum Company · 2002
- Organometal catalyst compositions300US 6,376,415 B1Phillips Petroleum Company · 2002
- Silica-coated alumina activator-supports for metallocene catalyst compositions292US 7,884,163 B2Chevron Phillips Chemical Company LP · 2011