C08F 4/022
Magnesium halide as support anhydrous or hydrated or complexed by means of
Official title: {Magnesium halide as support anhydrous or hydrated or complexed by means of a Lewis base for Ziegler-type catalysts}
C08F4/022 (Magnesium halide as support anhydrous or hydrated or complexed by means of) appears on 174 US grants and 77 published applications in this corpus.
Search patents in C08F- Granted patents
- 174
- Published applications
- 77
- Assignees
- 60
- Inventors
- 366
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 18 | 0 |
| 1979 | 8 | 0 |
| 1980 | 18 | 0 |
| 1981 | 18 | 0 |
| 1982 | 22 | 0 |
| 1983 | 10 | 0 |
| 1984 | 6 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 2 | 3 |
| 2017 | 0 | 2 |
| 2018 | 6 | 6 |
| 2019 | 2 | 15 |
| 2020 | 6 | 8 |
| 2021 | 5 | 15 |
| 2022 | 12 | 3 |
| 2023 | 3 | 6 |
| 2024 | 7 | 3 |
| 2025 | 3 | 6 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Carrier for olefin polymerization catalyst and application thereof, catalyst for olefin polymerization and application thereof, and olefin polymerization method14 Jul 2026US 12,679,907 B2Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation
- Catalyst for propylene polymerization, catalyst system for propylene polymerization, and preparation and use thereof9 Jun 2026US 12,649,800 B2PetroChina Company Limited
- Process for preparing polypropylene composition5 Aug 2025US 12,378,330 B2Borealis AG
- Process for polymerization of polypropylene using ziegler-natta procatalyst with novel 1,3-diether internal donors5 Aug 2025US 12,378,332 B2Sabic Global Technologies B.V.
- Polyethylene composition for high pressure resistant pipes with improved homogeneity25 Mar 2025US 12,258,465 B2Borealis AG
- High dart impact and tear films from titanium based prepolymer catalyzed polyethylenes8 Oct 2026US 2026/0308292 A1Formosa Plastics Corporation, U. S. A
- Spherical catalyst for olefin polymerization17 Sep 2026US 2026/0275004 A1Zhejiang University
- High density polyethylene for pipe applications with improved pressure performance and mechanical properties30 Jul 2026US 2026/0217882 A1Abu Dhabi Polymers Co. Ltd (Borouge) - Sole Proprietorship L.L.C.
- Catalyst transition process23 Jul 2026US 2026/0209404 A1Borealis AG
- Process for producing polypropylene-ethylene random copolymer resin with sustainable reactor operability16 Apr 2026US 2026/0103548 A1W. R. Grace & Co.-Conn.
Most cited
By later US patents
- Catalyst components and catalysts for the polymerization of alpha-olefins362US 4,399,054 AMontedison S.p.A. · 1983
- Catalysts for the polymerization of olefins169US 4,298,718 AMontecatini Edison S.p.A. · 1981
- Components of catalysts for polymerizing alpha-olefins and the catalysts formed from the components159US 4,220,554 AMontedison S.p.A. · 1980
- Process for the stereoregular polymerization of alpha olefins145US 4,107,414 AMontecatini Edison S.p.A. · 1978
- Process for preparing spheroidally shaped products, solid at room temperature124US 4,469,648 AMontedison S.p.A. · 1984