C08F 4/63922
Containing at least two cyclopentadienyl rings, fused or not
Official title: {containing at least two cyclopentadienyl rings, fused or not}
C08F4/63922 (Containing at least two cyclopentadienyl rings, fused or not) appears on 189 US grants and 26 published applications in this corpus.
Search patents in C08F- Granted patents
- 189
- Published applications
- 26
- Assignees
- 37
- Inventors
- 204
- Latest grant
- 26 Oct 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 1 | 0 |
| 1992 | 10 | 0 |
| 1993 | 7 | 0 |
| 1994 | 11 | 0 |
| 1995 | 18 | 0 |
| 1996 | 16 | 0 |
| 1997 | 24 | 0 |
| 1998 | 21 | 0 |
| 1999 | 9 | 0 |
| 2000 | 14 | 0 |
| 2001 | 10 | 2 |
| 2002 | 8 | 4 |
| 2003 | 9 | 0 |
| 2004 | 3 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 2 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 3 |
| 2014 | 2 | 1 |
| 2015 | 2 | 2 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 4 |
| 2019 | 5 | 3 |
| 2020 | 3 | 2 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
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
- Methods for restoring metallocene solids exposed to air4 Feb 2020US 10,550,208 B2Chevron Phillips Chemical Company LP
- Catalyst composition and method of preparing polyolefin using the same24 Dec 2019US 10,513,474 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.
- Bimetallic catalytic compounds and compositions comprising permethylpentalene ligands19 Sep 2019US 2019/0283008 A1
- Chromium (III) Catalyst Systems With Activator-Supports23 May 2019US 2019/0153129 A1Chevron Phillips Chemical Company LP
- Methods for Restoring Metallocene Solids Exposed to Air16 May 2019US 2019/0144572 A1Chevron Phillips Chemical Company LP
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
- 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
- Process for producing polyolefins and polyolefin catalysts199US 4,939,217 APhillips Petroleum Company · 1990