C08F 4/63925
Two cyclopentadienyl rings being mutually non-bridged
Official title: {two cyclopentadienyl rings being mutually non-bridged}
C08F4/63925 (Two cyclopentadienyl rings being mutually non-bridged) appears on 23 US grants and 11 published applications in this corpus.
Search patents in C08F- Granted patents
- 23
- Published applications
- 11
- Assignees
- 14
- Inventors
- 42
- Latest grant
- 4 Feb 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 1 |
| 2003 | 3 | 0 |
| 2004 | 2 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 2 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 4 |
| 2019 | 4 | 1 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- 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.
- Catalyst system for olefin oligomerization and method for olefin oligomerization using the same1 Oct 2019US 10,427,991 B2LG Chem.Ltd.
- Methods for restoring metallocene solids exposed to air5 Mar 2019US 10,221,258 B2Chevron Phillips Chemical Company LP
- Catalyst system for olefin oligomerization reaction, and method for olefin oligomerization using the same19 Feb 2019US 10,207,963 B2LG Chem.Ltd.
- Methods for Restoring Metallocene Solids Exposed to Air16 May 2019US 2019/0144572 A1Chevron Phillips Chemical Company LP
- Methods for Restoring Metallocene Solids Exposed to Air20 Sep 2018US 2018/0265606 A1Chevron Phillips Chemical Company LP
- Catalyst system for olefin oligomerization and method for olefin oligomerization using the same10 May 2018US 2018/0127333 A1LG Chem.Ltd.
- Catalyst system for olefin oligomerization reaction, and method for olefin oligomerization using the same5 Apr 2018US 2018/0094085 A1LG Chem.Ltd.
- Catalyst composition and method of preparing polyolefin using the same1 Feb 2018US 2018/0030166 A1LG Chem.Ltd.
Most cited
By later US patents
- Polymerization process using a silica gel supported metallocene-alumoxane catalyst108US 5,147,949 AExxon Chemical Patents Inc. · 1992
- Process for producing polyolefins70US 5,648,439 APhillips Petroleum Company · 1997
- Ethylene polymer produced using a catalyst comprising a phosphate and with a bis-(cyclopentadienyl)chromium(II) compound52US 4,803,253 APhillips Petroleum Company · 1989
- Process for reducing sheeting during polymerization of alpha-olefins40US 4,876,320 AUnion Carbide Chemicals and Plastics Company Inc. · 1989
- Process for reducing sheeting during polymerization of alpha-olefins39US 4,792,592 AUnion Carbide Corporation · 1988