C08F 4/545
Rare earths being present
Official title: {rare earths being present, e.g. triethylaluminium + neodymium octanoate}
C08F4/545 (Rare earths being present) appears on 83 US grants and 98 published applications in this corpus.
Search patents in C08F- Granted patents
- 83
- Published applications
- 98
- Assignees
- 38
- Inventors
- 165
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 3 |
| 2013 | 0 | 5 |
| 2014 | 2 | 7 |
| 2015 | 3 | 2 |
| 2016 | 11 | 1 |
| 2017 | 1 | 6 |
| 2018 | 3 | 8 |
| 2019 | 6 | 11 |
| 2020 | 7 | 12 |
| 2021 | 11 | 8 |
| 2022 | 7 | 14 |
| 2023 | 8 | 8 |
| 2024 | 10 | 2 |
| 2025 | 5 | 5 |
| 2026 | 4 | 4 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Synthesis of isoprene-butadiene copolymer rubbers9 Jun 2026US 12,649,811 B2G-3 Chickadee Purchaser, LLC
- Homogeneous rare earth catalyst and preparation method and use thereof5 May 2026US 12,617,882 B2Qingdao University of Science and Technology
- Catalytic system based on a rare-earth metallocene and a co-catalyst having a plurality of carbon-magnesium bonds21 Apr 2026US 12,606,644 B2Centre National De La Recherche Scientifique
- Polymerization process that include group III and lanthanide bis-phenyl-phenoxy metal-ligand complexes and chain transfer agents17 Feb 2026US 12,552,885 B2Dow Global Technologies LLC
- Modified high-Cis polybutadiene polymer, related methods and rubber compositions9 Sep 2025US 12,410,263 B2Bridgestone Americas Tire Operations, LLC
- Coupled polyethylenes or copolymers of ethylene and 1,3-diene, and process for the preparation thereof10 Sep 2026US 2026/0265418 A1Centre National De La Recherche Scientifique
- Method for preparing catalyst composition and method for preparing conjugated diene-based polymer9 Jul 2026US 2026/0193392 A1LG Chem.Ltd.
- Diene coupled copolymers rich in ethylene units and preparation method thereof18 Jun 2026US 2026/0167759 A1Compagnie Generale Des Etablissements Michelin
- Method of producing multimodal polyethylene using at least one group iii-based or lanthanide-based biphenylphenoxy catalyst12 Mar 2026US 2026/0071015 A1Dow Global Technologies LLC
- Method of manufacturing coordination compound of rare-earth element and method of polymerizing conjugated diene27 Nov 2025US 2025/0361332 A1Industrial Technology Research Institute
Most cited
By later US patents
- Method of producing conjugated diene polymers60US 6,255,416 B1Jsr Corporation · 2001
- Ultra-high activity non-metallocene pre-catalyst and method for catalytic polymerization of alpha-olefin monomers30US 6,333,423 B1Bar-Ilan University · 2001
- Method for catalytic polymerization of alpha-olefin monomers using an ultra-high activity non-metallocene pre-catalyst23US 6,596,827 B2Bar Ilanresearch and Development Company Ltd. · 2003
- Method for the copolymerization of conjugated diolefins (dienes) and vinyl-aromatic monomers with rare-earth catalysts and use of the copolymers in rubber mixtures for tire applications6US 6,399,726 B1Bayer Aktiengesellschaft · 2002
- Process and catalyst system for polydiene production6US 8,765,887 B2Bridgestone Corporation · 2014