C08F 4/68
Vanadium, niobium, tantalum or compounds thereof
C08F4/68 (Vanadium, niobium, tantalum or compounds thereof) appears on 28 US grants and 26 published applications in this corpus.
Search patents in C08F- Granted patents
- 28
- Published applications
- 26
- Assignees
- 28
- Inventors
- 96
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 3 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 3 | 2 |
| 2018 | 2 | 3 |
| 2019 | 2 | 3 |
| 2020 | 2 | 0 |
| 2021 | 1 | 4 |
| 2022 | 1 | 5 |
| 2023 | 2 | 1 |
| 2024 | 3 | 0 |
| 2025 | 3 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Ethylene copolymer for biaxial orientation2 Dec 2025US 12,486,345 B2NOVA Chemicals (International) S.A.
- Glass powder and chemical polymerization initiator4 Nov 2025US 12,460,021 B2GC Corporation
- Supported three-center catalyst and preparation method and application18 Mar 2025US 12,252,575 B2South China Agricultural University
- EPDM copolymer and method of preparing the same20 Aug 2024US 12,065,524 B2SK Geo Centric Co., Ltd.
- Ziegler-Natta catalyst with an electron donor compound for increasing polymer molecular weight26 Mar 2024US 11,939,417 B2Dow Global Technologies LLC
- Ethylene copolymer for biaxial orientation27 Jul 2023US 2023/0235106 A1NOVA Chemicals (International) S.A.
- EPDM Terpolymer and Manufacturing Method Therefor29 Dec 2022US 2022/0411548 A1Hyundai Motor Company
- EPDM Copolymer and Method of Preparing the Same8 Dec 2022US 2022/0389140 A1SK Geo Centric Co., Ltd.
- Glass powder and chemical polymerization initiator20 Oct 2022US 2022/0332857 A1GC Corporation
- Phosphinic vanadium complex, catalytic system comprising said phosphinic vanadium complex and process for the (co) polymerization of conjugated dienes9 Jun 2022US 2022/0177500 A1Versalis S.P.A.
Most cited
By later US patents
- Ziegler-natta—metallocene dual catalyst systems with activator-supports49US 9,540,457 B1Chevron Phillips Chemical Company LP · 2017
- Multi-metallic ziegler-natta procatalysts and cataysts prepared therefrom for olefin polymerizations12US 9,255,160 B2Dow Global Technologies LLC · 2016
- Catalyst system for producing ethylene polymers5US 4,208,304 APhillips Petroleum Company · 1980
- Tetravalent vanadium compounds which are soluble in organic solvents2US 4,324,736 ADynamit Noble Aktiengesellschaft · 1982
- Method for producing solid catalyst component containing vanadium compound for olefin polymerization, olefin polymerization catalyst, and method for producing olefin polymer1US 10,113,014 B1Toho Titanium Co., Ltd. · 2018