C08F 4/65925
Two cyclopentadienyl rings being mutually non-bridged
Official title: {two cyclopentadienyl rings being mutually non-bridged}
C08F4/65925 (Two cyclopentadienyl rings being mutually non-bridged) appears on 828 US grants and 734 published applications in this corpus.
Search patents in C08F- Granted patents
- 828
- Published applications
- 734
- Assignees
- 171
- Inventors
- 1,350
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 13 | 0 |
| 1996 | 13 | 0 |
| 1997 | 18 | 0 |
| 1998 | 11 | 0 |
| 1999 | 19 | 0 |
| 2000 | 27 | 0 |
| 2001 | 36 | 8 |
| 2002 | 36 | 34 |
| 2003 | 49 | 46 |
| 2004 | 27 | 46 |
| 2005 | 38 | 41 |
| 2006 | 25 | 21 |
| 2007 | 28 | 34 |
| 2008 | 17 | 24 |
| 2009 | 19 | 14 |
| 2010 | 16 | 25 |
| 2011 | 21 | 34 |
| 2012 | 23 | 30 |
| 2013 | 33 | 31 |
| 2014 | 35 | 19 |
| 2015 | 22 | 33 |
| 2016 | 31 | 39 |
| 2017 | 29 | 36 |
| 2018 | 30 | 40 |
| 2019 | 37 | 47 |
| 2020 | 33 | 19 |
| 2021 | 40 | 38 |
| 2022 | 21 | 26 |
| 2023 | 15 | 14 |
| 2024 | 17 | 16 |
| 2025 | 12 | 9 |
| 2026 | 7 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Bimodal polyethylene copolymer and film thereof19 May 2026US 12,630,657 B2Dow Global Technologies LLC
- Polyethylene and its chlorinated polyethylene28 Apr 2026US 12,612,473 B2LG Chem.Ltd.
- Mixed catalytic composition, catalyst comprising the same, and processes for preparing the same21 Apr 2026US 12,606,645 B2Hanwha Solutions Corporation
- Linear low density polyethylene for film applications14 Apr 2026US 12,600,844 B2ExxonMobil Chemical Patents Inc.
- Modifications of sulfated bentonites and uses thereof in metallocene catalyst systems for olefin polymerization3 Mar 2026US 12,565,543 B2Chevron Phillips Chemical Company LP
- Asymmetrical hafnium metallocenes10 Sep 2026US 2026/0265283 A1Dow Global Technologies LLC
- Symmetrical hafnium metallocene for making polymers with broad-orthogonal composition distributions10 Sep 2026US 2026/0265284 A1Dow Global Technologies LLC
- Polyolefin compositions for rotomolding10 Sep 2026US 2026/0265429 A1Dow Global Technologies LLC
- Symmetrical zirconium metallocenes having isobutyl cyclopentadienyl ligands27 Aug 2026US 2026/0250309 A1Dow Global Technologies LLC
- Polyolefin compositions for injection molding27 Aug 2026US 2026/0250438 A1Dow Global Technologies LLC
Most cited
By later US patents
- Ionic metallocene catalyst compositions596US 5,198,401 AExxon Chemical Patents Inc. · 1993
- Process for the preparation of polyolefins397US 4,542,199 AHoechst Aktiengesellschaft · 1985
- Compositions that can produce polymers334US 6,300,271 B1Phillips Petroleum Company · 2001
- Organometal catalyst compositions329US 6,355,594 B1Phillips Petroleum Company · 2002
- Process for polymerizing monomers in fluidized beds327US 5,405,922 AExxon Chemical Patents Inc. · 1995