C08F 4/42
Metals
Official title: Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
C08F4/42 (Metals) appears on 6,261 US grants and 5,432 published applications in this corpus.
Search patents in C08F- Granted patents
- 6,261
- Published applications
- 5,432
- Assignees
- 897
- Inventors
- 7,621
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 9 | 0 |
| 1978 | 10 | 0 |
| 1979 | 5 | 0 |
| 1980 | 8 | 0 |
| 1981 | 15 | 0 |
| 1982 | 7 | 0 |
| 1983 | 8 | 0 |
| 1984 | 7 | 0 |
| 1985 | 6 | 0 |
| 1986 | 10 | 0 |
| 1987 | 16 | 0 |
| 1988 | 12 | 0 |
| 1989 | 16 | 0 |
| 1990 | 31 | 0 |
| 1991 | 37 | 0 |
| 1992 | 43 | 0 |
| 1993 | 60 | 0 |
| 1994 | 70 | 0 |
| 1995 | 102 | 0 |
| 1996 | 123 | 0 |
| 1997 | 168 | 0 |
| 1998 | 187 | 0 |
| 1999 | 144 | 0 |
| 2000 | 232 | 0 |
| 2001 | 310 | 86 |
| 2002 | 319 | 215 |
| 2003 | 248 | 234 |
| 2004 | 198 | 233 |
| 2005 | 184 | 190 |
| 2006 | 176 | 171 |
| 2007 | 136 | 137 |
| 2008 | 85 | 137 |
| 2009 | 94 | 169 |
| 2010 | 128 | 147 |
| 2011 | 126 | 151 |
| 2012 | 108 | 157 |
| 2013 | 146 | 224 |
| 2014 | 161 | 203 |
| 2015 | 202 | 201 |
| 2016 | 212 | 223 |
| 2017 | 198 | 251 |
| 2018 | 196 | 283 |
| 2019 | 222 | 308 |
| 2020 | 237 | 290 |
| 2021 | 274 | 310 |
| 2022 | 252 | 321 |
| 2023 | 182 | 266 |
| 2024 | 182 | 232 |
| 2025 | 205 | 172 |
| 2026 | 149 | 121 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Olefin-based polymer and method for preparing same6 Oct 2026US 12,753,253 B2Hanwha Solutions Corporation
- Thermoplastic resin composition6 Oct 2026US 12,753,300 B2LG Chem.Ltd.
- Tellurium-containing compound, polymer, and method for producing polymer29 Sep 2026US 12,747,306 B2AGC Inc.
- Propylene copolymers obtained using transition metal bis(phenolate) catalyst complexes and homogeneous process for production thereof29 Sep 2026US 12,747,311 B2ExxonMobil Technology and Engineering Company
- Process and catalysts for hydrogen mediated anionic polymerization of conjugated dienes and liquid polymers thereof29 Sep 2026US 12,747,315 B2Albemarle Corporation
- 5,6,7,8-tetrahydro-1-naphthol-phosphine post-transition metal complexes, preparation method therefor, and use thereof8 Oct 2026US 2026/0308190 A1China Petroleum & Chemical Corporation
- Supported olefin polymerization catalysts comprising substituted 2-hydroxythiophene compounds8 Oct 2026US 2026/0308284 A1Dow Global Technologies LLC
- Ethylene/alpha-olefin copolymer and preparation method thereof8 Oct 2026US 2026/0308291 A1China Petroleum & Chemical Corporation
- High dart impact and tear films from titanium based prepolymer catalyzed polyethylenes8 Oct 2026US 2026/0308292 A1Formosa Plastics Corporation, U. S. A
- A highly efficient process for the recovery and conversion of methylaluminoxane residues24 Sep 2026US 2026/0285883 A1LANXESS Organometallics GmbH
Most cited
By later US patents
- Elastic substantially linear olefin polymers1,374US 5,272,236 AThe Dow Chemical Company · 1993
- Elastic substantialy linear olefin polymers1,117US 5,278,272 AThe Dow Chemical Company · 1994
- Supported polymerization catalyst710US 4,808,561 AExxon Chemical Patents Inc. · 1989
- Metal complex compounds688US 5,064,802 AThe Dow Chemical Company · 1991
- Ionic metallocene catalyst compositions596US 5,198,401 AExxon Chemical Patents Inc. · 1993