C08F 4/639
Component covered by group c08f4/62 containing a transition metal-carbon bond
Official title: Component covered by group C08F4/62 containing a transition metal-carbon bond {(C08F4/62003 - C08F4/62196 take precedence)}
C08F4/639 (Component covered by group c08f4/62 containing a transition metal-carbon bond) appears on 359 US grants and 98 published applications in this corpus.
Search patents in C08F- Granted patents
- 359
- Published applications
- 98
- Assignees
- 85
- Inventors
- 486
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 7 | 0 |
| 1991 | 3 | 0 |
| 1992 | 11 | 0 |
| 1993 | 10 | 0 |
| 1994 | 16 | 0 |
| 1995 | 25 | 0 |
| 1996 | 27 | 0 |
| 1997 | 34 | 0 |
| 1998 | 33 | 0 |
| 1999 | 15 | 0 |
| 2000 | 30 | 0 |
| 2001 | 21 | 5 |
| 2002 | 15 | 9 |
| 2003 | 19 | 10 |
| 2004 | 10 | 7 |
| 2005 | 8 | 4 |
| 2006 | 3 | 8 |
| 2007 | 7 | 5 |
| 2008 | 0 | 4 |
| 2009 | 9 | 2 |
| 2010 | 4 | 3 |
| 2011 | 1 | 2 |
| 2012 | 1 | 6 |
| 2013 | 3 | 4 |
| 2014 | 5 | 3 |
| 2015 | 6 | 3 |
| 2016 | 3 | 2 |
| 2017 | 0 | 3 |
| 2018 | 1 | 4 |
| 2019 | 9 | 5 |
| 2020 | 4 | 6 |
| 2021 | 2 | 1 |
| 2022 | 2 | 0 |
| 2023 | 3 | 2 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C08F 4/63912In combination with an organoaluminium compound289
- C08F 4/6392Containing at least one cyclopentadienyl ring, condensed or not261
- C08F 4/63916Supported on a carrier146
- C08F 4/63908In combination with an ionising compound other than alumoxane58
- C08F 4/63904In combination with another component of c08f4/6240
Recent patents
- Ring opening metathesis catalyst systems for cyclic olefin polymerization17 Feb 2026US 12,552,878 B2ExxonMobil Chemical Patents Inc.
- Method for preparing supported metallocene catalyst, supported metallocene catalyst, and method for preparing polyolefin using the same23 Sep 2025US 12,421,328 B2LG Chem.Ltd.
- Method of making a polyolefin28 Nov 2023US 11,827,734 B1King Fahd University of Petroleum and Minerals
- Rubber composition20 Jun 2023US 11,680,153 B2LG Chem, Ltd.
- Process for the preparation of an olefinic copolymer having polar groups and the products obtained therefrom14 Mar 2023US 11,603,419 B2Sabic Global Technologies B.V.
- Improved Ring Opening Metathesis Catalyst Systems for Cyclic Olefin Polymerization25 May 2023US 2023/0159670 A1ExxonMobil Chemical Patents Inc.
- Method for preparing supported metallocene catalyst, supported metallocene catalyst, and method for preparing polyolefin using the same13 Apr 2023US 2023/0110235 A1LG Chem.Ltd.
- Supported catalyst system22 Jul 2021US 2021/0221923 A1Albert-Ludwigs-Universität Freiburg
- Chromium (III) Catalyst Systems With Activator-Supports30 Jul 2020US 2020/0239605 A1Chevron Phillips Chemical Company LP
- Method of Preparing Conjugated Diene-Based Polymer and Apparatus for Preparing Conjugated Diene-Based Polymer2 Jul 2020US 2020/0207888 A1LG Chem.Ltd.
Most cited
By later US patents
- Supported polymerization catalyst710US 4,808,561 AExxon Chemical Patents Inc. · 1989
- Process and catalyst for producing syndiotactic polyolefins344US 4,892,851 AFina Technology, Inc. · 1990
- 2-substituted disindenylmetallocenes, process for their preparation, and their use as catalysts in the polymerization of olefins290US 5,145,819 AHoechst Aktiengesellschaft · 1992
- Organometal compound catalyst286US 6,391,816 B1Phillips Petroleum Company · 2002
- Propylene polymer, propylene copolymer, and propylene elastomer prepared using novel bridged indenyl containing metallocenes268US 5,504,172 AMitsui Petrochemical Industries, Ltd. · 1996