C08F 4/63927
Two cyclopentadienyl rings being mutually bridged
Official title: {two cyclopentadienyl rings being mutually bridged}
C08F4/63927 (Two cyclopentadienyl rings being mutually bridged) appears on 102 US grants and 10 published applications in this corpus.
Search patents in C08F- Granted patents
- 102
- Published applications
- 10
- Assignees
- 18
- Inventors
- 105
- Latest grant
- 26 Oct 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 7 | 0 |
| 1993 | 4 | 0 |
| 1994 | 9 | 0 |
| 1995 | 6 | 0 |
| 1996 | 10 | 0 |
| 1997 | 13 | 0 |
| 1998 | 15 | 0 |
| 1999 | 5 | 0 |
| 2000 | 10 | 0 |
| 2001 | 9 | 1 |
| 2002 | 3 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 2 | 2 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Dimethyl-silyl-bridged-1-substituted-2-indenyl metallocene complexes for olefin polymerization26 Oct 2021US 11,155,659 B2Sabic Global Technologies B.V.
- Chromium (III) catalyst systems with activator-supports8 Dec 2020US 10,858,459 B2Chevron Phillips Chemical Company LP
- Chromium (III) catalyst systems with activator-supports26 May 2020US 10,662,266 B2Chevron Phillips Chemical Company LP
- Chromium (III) catalyst systems with activator-supports2 Apr 2019US 10,246,528 B2Chevron Phillips Chemical Company LP
- Olefin block copolymer16 Jun 2015US 9,056,939 B2LG Chem.Ltd.
- Chromium (III) Catalyst Systems With Activator-Supports30 Jul 2020US 2020/0239605 A1Chevron Phillips Chemical Company LP
- Dimethyl-silyl-bridged-1-substituted-2-indenyl metallocene complexes for olefin polymerization16 Apr 2020US 2020/0115478 A1Sabic Global Technologies B.V.
- Chromium (III) Catalyst Systems With Activator-Supports23 May 2019US 2019/0153129 A1Chevron Phillips Chemical Company LP
- Chromium (III) Catalyst Systems With Activator-Supports9 Jul 2015US 2015/0191554 A1Chevron Phillips Chemical Company LP
- Olefin block copolymer7 Nov 2013US 2013/0296519 A1LG Chem.Ltd.
Most cited
By later US patents
- 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
- Propylene polymer, propylene copolymer, and propylene elastomer prepared using novel bridged indenyl containing metallocenes268US 5,504,172 AMitsui Petrochemical Industries, Ltd. · 1996
- Soluble catalyst systems for the preparation of polyalk-1-enes having high molecular weights196US 5,296,434 ABASF SE · 1994
- Process for the preparation of cycloolefin polymers185US 5,087,677 AHoechst Aktiengesellschaft · 1992