C08F 4/22
Of chromium, molybdenum or tungsten
Official title: of chromium, molybdenum or tungsten
C08F4/22 (Of chromium, molybdenum or tungsten) appears on 59 US grants and 64 published applications in this corpus.
Search patents in C08F- Granted patents
- 59
- Published applications
- 64
- Assignees
- 22
- Inventors
- 108
- Latest grant
- 13 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 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 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 6 |
| 2014 | 1 | 2 |
| 2015 | 3 | 2 |
| 2016 | 5 | 2 |
| 2017 | 1 | 1 |
| 2018 | 0 | 5 |
| 2019 | 8 | 8 |
| 2020 | 2 | 13 |
| 2021 | 9 | 2 |
| 2022 | 8 | 9 |
| 2023 | 7 | 3 |
| 2024 | 6 | 3 |
| 2025 | 2 | 2 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods for chromium catalyst activation using oxygen-enriched fluidization gas13 May 2025US 12,297,310 B2Chevron Phillips Chemical Company LP
- Rapid activation process and activation treatments for chromium catalysts for producing high melt index polyethylenes21 Jan 2025US 12,202,914 B2Chevron Phillips Chemical Company LP
- Aqueous methods for titanating a chromium/silica catalyst10 Dec 2024US 12,161,997 B2Chevron Phillips Chemical Company LP
- Modified supported chromium catalysts and ethylene-based polymers produced therefrom13 Aug 2024US 12,059,672 B2Chevron Phillips Chemical Company LP
- Methods of preparing a catalyst7 May 2024US 11,976,142 B2Chevron Phillips Chemical Company LP
- High-refractive-index transparent cyclic olefin polymer and preparation method thereof2 Jul 2026US 2026/0184825 A1Tianjin University
- Fines reduction and agglomeration of catalyst system components for use in olefin polymerizations28 May 2026US 2026/0146109 A1
- Catalyst for photocatalytic polymerization reaction, and application thereof12 Jun 2025US 2025/0188201 A1Beijing Institute of Fashion Technology
- Method of preparing a titanium-modified cr/silica catalyst15 May 2025US 2025/0154295 A1Ecovyst Catalyst Technologies LLC
- Polyethylene for use in the production of crosslinked polyethylene (pex)19 Sep 2024US 2024/0309125 A1
Most cited
By later US patents
- Methods of preparing a catalyst55US 10,287,369 B2Chevron Phillips Chemical Company LP · 2019
- Methods of preparing a catalyst37US 10,654,953 B2Chevron Phillips Chemical Company LP · 2020
- Methods of preparing a catalyst32US 10,513,570 B2Chevron Phillips Chemical Company LP · 2019
- MVTR resin produced with post-titanated Cr/Si/Ti catalyst17US 6,531,565 B2Chevron Phillips Chemical Company LP · 2003
- Cycloolefin metathesis catalyst7US 3,997,471 AThe Goodyear Tire & Rubber Company · 1976