Description
Class C08F : MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
Subclass 2/34: Processes of polymerisation Polymerisation in gaseous state
C08F 2/34
Sub-Class
Stats
- 471 US PATENTS IN FORCE
- 56 US APPLICATIONS PENDING
- 73 Total Patent Owners
- 1,644 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12240968 | Proplylene-based copolymer product | Jun 28, 23 | Mar 04, 25 | Braskem S.A. |
| 12202917 | Methods for improving gas phase polymerization | Mar 04, 20 | Jan 21, 25 | ExxonMobil Chemical Patents Inc. |
| 12202956 | Bimodal polyethylene-based composition | Aug 19, 20 | Jan 21, 25 | Dow Global Technologies LLC |
| 12173108 | Method of changing melt rheology property of bimodal polyethylene polymer | Aug 21, 19 | Dec 24, 24 | Univation Technologies LLC |
| 12152095 | Methods for improving production in gas phase polymerization | Mar 04, 20 | Nov 26, 24 | ExxonMobil Chemical Patents Inc. |
| 12152101 | Process for preparing catalysts and catalyst compositions | Oct 11, 23 | Nov 26, 24 | Formosa Plastics Corporation U.S.A. |
| 12145124 | Plasma polymerisation apparatus | Sep 06, 19 | Nov 19, 24 | NANOMEDX, INC. |
| 12134688 | Polypropylene pipe composition | May 07, 19 | Nov 05, 24 | Borealis AG |
| 12103988 | Gas-phase process for preparing ethylene polymers | Dec 16, 19 | Oct 01, 24 | Basell Polyolefine GmbH |
| 12091476 | On-line adjustment of catalysts by trim and olefin polymerization | Oct 30, 19 | Sep 17, 24 | ExxonMobil Chemical Patents Inc. |
| 12077616 | Production of polyethylene and ethylene oligomers from ethanol and the use of biomass and waste streams as feedstocks to produce the ethanol | Dec 15, 21 | Sep 03, 24 | Chevron Phillips Chemical Company LP |
| 12071502 | Method of making an ethylene-propylene copolymer | Oct 20, 22 | Aug 27, 24 | King Fahd University of Petroleum and Minerals; S-Oil Corporation; |
| 12060443 | Process | Dec 09, 21 | Aug 13, 24 | Ineos USA, LLC |
| 12049526 | Olefin polymerization method using antistatic agent for metallocene olefin polymerization process | Dec 22, 21 | Jul 30, 24 | DL Chemical CO., LTD. |
| 12043679 | On-line adjustment of mixed catalyst ratio by trim and olefin polymerization with the same | Oct 30, 19 | Jul 23, 24 | ExxonMobil Chemical Patents Inc. |
| 12018102 | Process for polymerizing olefin in a gas phase reactor with improved thermal homogeneity | May 29, 19 | Jun 25, 24 | Borealis AG |
| 12012475 | Method of olefin polymerization using alkane-soluble non-metallocene precatalyst | Oct 11, 19 | Jun 18, 24 | Dow Global Technologies LLC |
| 12012504 | Process for the preparation of multimodal high density polyethylene | May 30, 19 | Jun 18, 24 | Borealis AG |
| 11945938 | Bimodal polyethylene copolymers | Apr 20, 23 | Apr 02, 24 | Chevron Phillips Chemical Company LP |
| 11897975 | Multi-stage process for producing a C2 to C8 olefin polymer composition | Sep 19, 19 | Feb 13, 24 | Borealis AG |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0115,692 | OLEFIN-BASED POLYMER | Oct 01, 24 | Apr 10, 25 | Not available |
| 2025/0092,173 | POLYOLEFIN POLYMER AND POLYOLEFIN POLYMERIZATION SYSTEM AND METHOD | Jul 23, 24 | Mar 20, 25 | Not available |
| 2025/0034,291 | IMIDAZOLIUM-BASED ZWITTERIONIC POLYMER | Nov 14, 22 | Jan 30, 25 | Cornell Research Foundation Inc. Cornell University |
| 2025/0026,873 | PROPYLENE POLYMERS FOR THREE-DIMENSIONAL PRINTING | Jul 11, 24 | Jan 23, 25 | LUMMUS NOVOLEN TECHNOLOGY GMBH |
| 2025/0019,468 | UPGRADED DRAFT TUBE FOR OLEFIN FLUIDIZED BED POLYMERIZATION | Nov 14, 22 | Jan 16, 25 | Not available |
| 2025/0019,474 | POLYOLEFIN HAVING EXCELLENT PROCESSABILITY AND PROCESS FOR PREPARING SAME | Nov 22, 22 | Jan 16, 25 | Not available |
| 2025/0011,478 | SUPPORTED CATALYST SYSTEMS CONTAINING A CARBON BRIDGED, ANTHRACENYL SUBSTITUTED BIS-BIPHENYL-PHENOXY ORGANOMETALLIC COMPOUND FOR MAKING POLYETHYLENE AND POLYETHYLENE COPOLYMER RESINS IN A GAS PHASE POLYMERIZATION REACTOR | Nov 21, 22 | Jan 09, 25 | Dow Global Technologies LLC |
| 2024/0425,627 | HDPE INTERMEDIATE BULK CONTAINER RESIN USING ADVANCED CHROME CATALYST BY POLYETHYLENE GAS PHASE TECHNOLOGY | Oct 14, 22 | Dec 26, 24 | Univation Technologies, LLC |
| 2024/0417,492 | METHODS OF MAKING BIMODAL POLYETHYLENES | Oct 25, 22 | Dec 19, 24 | Univation Technologies, LLC |
| 2024/0400,733 | ETHYLENE/1-HEXENE COPOLYMERS | Oct 10, 22 | Dec 05, 24 | Dow Global Technologies LLC |
| 2024/0392,043 | PROCESS FOR PRODUCING A PROPYLENE COPOLYMER | Sep 15, 22 | Nov 28, 24 | Borealis AG |
| 2024/0376,236 | BIMODAL POLY(ETHYLENE-CO-1-ALKENE) COPOLYMER AND BLOW-MOLDED INTERMEDIATE BULK CONTAINERS MADE THEREFROM | Oct 18, 22 | Nov 14, 24 | Not available |
| 2024/0343,839 | GAS PHASE POLYMERIZATION PROCESS WITH IMPROVED GAS RECYCLING | Aug 30, 22 | Oct 17, 24 | Not available |
| 2024/0343,840 | PROCESS FOR PRODUCING POLYOLEFIN GRANULAR RESIN WITH INCREASED SETTLED BULK DENSITY | Aug 08, 22 | Oct 17, 24 | W. R. Grace & Co. - Conn. |
| 2024/0317,901 | UTILIZATION OF 1-HEXENE IN MULTI-STAGE POLYOLEFIN PRODUCTION | Jun 23, 22 | Sep 26, 24 | Not available |
| 2024/0294,681 | IMPROVING CATALYST PERFORMANCE IN MULTI-STAGE POLYOLEFIN PRODUCTION | Jun 23, 22 | Sep 05, 24 | Not available |
| 2024/0294,682 | PROCESS FOR PRODUCING POLYETHYLENE POLYMERS | Jun 23, 22 | Sep 05, 24 | Not available |
| 2024/0279,450 | FILLED POLYOLEFIN COMPOSITION | Jun 03, 22 | Aug 22, 24 | BASELL POLIOLEFINE ITALIA S.r.l. |
| 2024/0271,876 | HEAT EXCHANGER FOR GAS PHASE POLYMERIZATION | Jun 07, 22 | Aug 15, 24 | Basell Polyolefine GmbH |
| 2024/0254,264 | PROCESS FOR PREPARING AN OLEFIN POLYMER COMPRISING WITHDRAWING A GASEOUS SAMPLE FOR ANALYZING | May 17, 22 | Aug 01, 24 | Basell Polyolefine GmbH |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 31 Months (last 2 years Issuances)
- 31 Months (last 5 years Issuances)