C08F 2/34
Polymerisation in gaseous state
C08F2/34 (Polymerisation in gaseous state) appears on 337 US grants and 408 published applications in this corpus.
Search patents in C08F- Granted patents
- 337
- Published applications
- 408
- Assignees
- 85
- Inventors
- 913
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 2 |
| 2005 | 1 | 3 |
| 2006 | 0 | 1 |
| 2007 | 2 | 0 |
| 2008 | 0 | 3 |
| 2009 | 0 | 5 |
| 2010 | 3 | 4 |
| 2011 | 1 | 4 |
| 2012 | 3 | 1 |
| 2013 | 6 | 9 |
| 2014 | 9 | 10 |
| 2015 | 7 | 14 |
| 2016 | 16 | 22 |
| 2017 | 17 | 16 |
| 2018 | 15 | 50 |
| 2019 | 35 | 47 |
| 2020 | 38 | 49 |
| 2021 | 46 | 43 |
| 2022 | 36 | 24 |
| 2023 | 21 | 34 |
| 2024 | 19 | 34 |
| 2025 | 15 | 18 |
| 2026 | 18 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Olefin-based polymer and method for preparing same6 Oct 2026US 12,753,253 B2Hanwha Solutions Corporation
- Olefin polymerization method and system1 Sep 2026US 12,723,108 B2China Petroleum & Chemical Corporation
- Fluidic seal apparatus for continuous polymerization process25 Aug 2026US 12,715,940 B2Braskem S/A
- Polyolefin production apparatus and polyolefin production method18 Aug 2026US 12,708,889 B2Sumitomo Chemical Company, Limited
- Reactor vent control to avoid vent column breakthrough18 Aug 2026US 12,709,650 B2ExxonMobil Chemical Patents Inc.
- Supported olefin polymerization catalysts comprising substituted 2-hydroxythiophene compounds8 Oct 2026US 2026/0308284 A1Dow Global Technologies LLC
- High dart impact and tear films from titanium based prepolymer catalyzed polyethylenes8 Oct 2026US 2026/0308292 A1Formosa Plastics Corporation, U. S. A
- Process of starting up a gas phase olefin polymerization reaction1 Oct 2026US 2026/0297219 A1Basell Polyolefine GmbH
- Dual Catalyst System for Producing High Density Polyethylenes With Long Chain Branching10 Sep 2026US 2026/0265420 A1Chevron Phillips Chemical Company LP
- Pipes including high density multimodal polyethylene compositions30 Jul 2026US 2026/0218818 A1Dow Global Technologies LLC
Most cited
By later US patents
- Gas phase polymerization reactions utilizing soluble unsupported catalysts260US 5,317,036 AUnion Carbide Chemicals & Plastics Technology Corporation · 1994
- Process and apparatus for introducing a solid into a reactor59US 5,556,238 ABP Chemicals Limited · 1996
- Methods of preparing a catalyst55US 10,287,369 B2Chevron Phillips Chemical Company LP · 2019
- Method of removing heat from polymerization reactions of monomers in the gas phase51US 4,012,573 ABASF SE · 1977
- Catalyst compositions and method of polymerization therewith49US 6,420,580 B1Univation Technologies, LLC · 2002