C08F 2420/09
Cyclic bridge, i.e. cp or analog where the bridging unit linking the
Official title: Cyclic bridge, i.e. Cp or analog where the bridging unit linking the two Cps or analogs is part of a cyclic group
C08F2420/09 (Cyclic bridge, i.e. cp or analog where the bridging unit linking the) appears on 121 US grants and 106 published applications in this corpus.
Search patents in C08F- Granted patents
- 121
- Published applications
- 106
- Assignees
- 35
- Inventors
- 273
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 21 | 5 |
| 2003 | 2 | 7 |
| 2004 | 1 | 0 |
| 2005 | 6 | 3 |
| 2006 | 0 | 1 |
| 2007 | 2 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 2 |
| 2012 | 1 | 2 |
| 2013 | 1 | 1 |
| 2014 | 4 | 3 |
| 2015 | 4 | 11 |
| 2016 | 8 | 12 |
| 2017 | 10 | 11 |
| 2018 | 11 | 9 |
| 2019 | 9 | 7 |
| 2020 | 5 | 3 |
| 2021 | 4 | 7 |
| 2022 | 5 | 5 |
| 2023 | 1 | 5 |
| 2024 | 0 | 5 |
| 2025 | 8 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Metallocene compound, catalyst composition comprising the same, and method for preparing olefin polymer using the same5 May 2026US 12,617,881 B2LG Chem.Ltd.
- Polyethylene and its chlorinated polyethylene28 Apr 2026US 12,612,473 B2LG Chem.Ltd.
- Production of polypropylene with low volatiles30 Dec 2025US 12,509,536 B2Borealis AG
- Comb-block copolymers and methods thereof9 Sep 2025US 12,410,273 B2ExxonMobil Chemical Patents Inc.
- Olefin polymerization catalyst, olefin polymerization catalyst production method, and olefin polymer production method using the olefin polymerization catalyst2 Sep 2025US 12,404,353 B2Japan Polypropylene Corporation
- Metallocenes containing alkenyloxyphenyl groups producing high molecular weight polyethylene11 Jun 2026US 2026/0159615 A1Chevron Phillips Chemical Company LP
- Hydrocarbyl silyl-substituted ansa-metallocenes and process for preparing low melt elasticity polyolefins14 May 2026US 2026/0131320 A1Formosa Plastics Corporation, U. S. A
- Polyolefin compositions featuring in situ blending of an oil extension27 Mar 2025US 2025/0101156 A1ExxonMobil Technology and Engineering Company
- C1 symmetric metallocene catalysts tailored for production of vinyl-terminated polypropylene oligomers and macromonomers2 Jan 2025US 2025/0002617 A1ExxonMobil Technology and Engineering Company
- Ethylene-alpha-olefin copolymer, preparation method therefor, application and composition thereof5 Dec 2024US 2024/0400732 A1China Petroleum & Chemical Corporation
Most cited
By later US patents
- Process for the preparation of polyolefins having a broad molecular weight distribution125US 5,350,817 AHoechst Aktiengesellschaft · 1994
- Metallocene compound, process for producing metallocene compound, olefin polymerization catalyst, process for producing polyolefin, and polyolefin75US 6,939,928 B1Mitsui Chemicals, Inc. · 2005
- Catalyst compositions for producing high Mz/Mw polyolefins72US 8,383,754 B2Chevron Phillips Chemical Company LP · 2013
- Polymerization process for producing easier processing polymers69US 6,339,134 B12002
- Process for the preparation of polyolefins50US 5,565,534 AHoechst Aktiengesellschaft · 1996