C08F 4/00
Polymerisation catalysts
C08F4/00 (Polymerisation catalysts) appears on 7,782 US grants and 6,633 published applications in this corpus.
Search patents in C08F- Granted patents
- 7,782
- Published applications
- 6,633
- Assignees
- 1,352
- Inventors
- 10,941
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 54 | 0 |
| 1977 | 51 | 0 |
| 1978 | 59 | 0 |
| 1979 | 27 | 0 |
| 1980 | 48 | 0 |
| 1981 | 60 | 0 |
| 1982 | 41 | 0 |
| 1983 | 30 | 0 |
| 1984 | 22 | 0 |
| 1985 | 23 | 0 |
| 1986 | 27 | 0 |
| 1987 | 23 | 0 |
| 1988 | 16 | 0 |
| 1989 | 39 | 0 |
| 1990 | 43 | 0 |
| 1991 | 57 | 0 |
| 1992 | 66 | 0 |
| 1993 | 76 | 0 |
| 1994 | 87 | 0 |
| 1995 | 114 | 0 |
| 1996 | 139 | 0 |
| 1997 | 190 | 0 |
| 1998 | 217 | 0 |
| 1999 | 165 | 0 |
| 2000 | 258 | 0 |
| 2001 | 352 | 95 |
| 2002 | 352 | 257 |
| 2003 | 292 | 271 |
| 2004 | 248 | 276 |
| 2005 | 204 | 227 |
| 2006 | 197 | 210 |
| 2007 | 160 | 170 |
| 2008 | 103 | 172 |
| 2009 | 112 | 203 |
| 2010 | 155 | 191 |
| 2011 | 149 | 203 |
| 2012 | 136 | 207 |
| 2013 | 183 | 269 |
| 2014 | 205 | 251 |
| 2015 | 248 | 231 |
| 2016 | 253 | 270 |
| 2017 | 234 | 285 |
| 2018 | 226 | 338 |
| 2019 | 267 | 370 |
| 2020 | 283 | 347 |
| 2021 | 322 | 386 |
| 2022 | 290 | 403 |
| 2023 | 217 | 329 |
| 2024 | 234 | 292 |
| 2025 | 255 | 217 |
| 2026 | 173 | 163 |
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
- Method for manufacturing fluoroelastomers1 Oct 2026US 2026/0297220 A1SYENSQO SPECIALTY POLYMERS ITALY S.p.A.
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