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Stefan Seelert has worked on the following 42 EPO patent applications which have been published in the last five years:

EP11788475

METHOD FOR ACTIVATION OF CHROMIUM CONTAINING CATALYST PRECURSOR FOR POLYMERIZATION AND THE RESULTING POLYMERIZATION CATALYST

IPC classification:
B01J 8/18, B01J 23/26, B01J 38/32, C08F 10/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION IN PROGRESS
EP11788469

METHOD FOR ACTIVATION OF CHROMIUM CONTAINING CATALYST PRECURSOR POLYMERIZATION AND THE RESULTING POLYMERIZATION CATALYST

IPC classification:
B01J 8/24, B01J 23/26, B01J 37/14, B01J 38/14, B01J 38/30, B01J 38/32, C08F 10/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION IN PROGRESS
EP12708109

PROCESS FOR PREPARING ETHYLENE HOMOPOLYMERS OR COPOLYMERS IN A TUBULAR REACTOR WITH AT LEAST TWO REACTION ZONES HAVING DIFFERENT CONCENTRATIONS OF CHAIN TRANSFER AGENT

IPC classification:
B29C 47/02, C08F 2/38, C08F 4/34, C08F 10/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
PATENT GRANTED
EP12719978

PROCESS FOR THE MANUFACTURE OF A MIXED CATALYST SYSTEM FOR THE COPOLYMERIZATION OF ETHYLENE WITH C1-C12 ALPHA-OLEFINS

IPC classification:
C08F 210/16
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
GRANT OF PATENT INTENDED
EP12719962

A PROCESS FOR HOMOGENIZING AND PELLETIZING A POLYETHYLENE COMPOSITION

IPC classification:
B29B 9/06, B29C 47/68, C08F 6/26, C08F 6/28, C08L 23/06
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
GRANT OF PATENT INTENDED
EP12189392

Multistage process for the polymerization of olefins

IPC classification:
C08F 2/00, C08F 2/34, C08F 10/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
APPLICATION DEEMED TO BE WITHDRAWN
EP12729534

METHOD AND APPARATUS FOR DISCHARGING A POLYMER FROM A GAS-PHASE REACTOR

IPC classification:
C08F 2/34, C08F 10/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
GRANT OF PATENT INTENDED
EP11187690

Process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators

IPC classification:
C08F 10/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
APPLICATION DEEMED TO BE WITHDRAWN
EP11192070

Multistage process for the polymerization of olefins

IPC classification:
C08F 2/00, C08F 2/34, C08F 10/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
APPLICATION DEEMED TO BE WITHDRAWN
EP11194812

Process for controlling the polymer composition of an ethylene copolymer obtained by a catalyst system comprising a transition metal catalyst component and a Ziegler catalyst component

IPC classification:
C08F 210/16
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
APPLICATION DEEMED TO BE WITHDRAWN
EP12806022

PROCESS FOR CONTROLLING THE POLYMER COMPOSITION OF AN ETHYLENE COPOLYMER OBTAINED BY A CATALYST SYSTEM COMPRISING A TRANSITION METAL CATALYST COMPONENT AND A ZIEGLER CATALYST COMPONENT

IPC classification:
C08F 210/16
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
EP13168137

Process for the gas-phase polymerization of ethylene or ethylene mixtures

IPC classification:
C08F 2/34, C08F 110/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
APPLICATION DEEMED TO BE WITHDRAWN
EP13168101

Multistage process for the polymerization of olefins

IPC classification:
C08F 2/00, C08F 2/34, C08F 210/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
APPLICATION DEEMED TO BE WITHDRAWN
EP13171408

Polymerization process in the presence of an antistatically acting composition

IPC classification:
C08F 2/34, C08F 10/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
APPLICATION DEEMED TO BE WITHDRAWN
EP12779076

PROCESS FOR POLYMERIZING OR COPOLYMERIZING ETHYLENICALLY UNSATURATED MONOMERS IN THE PRESENCE OF FREE-RADICAL POLYMERIZATION INITIATORS

IPC classification:
C08F 10/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
EP12171911

Method for cooling a gas-phase reactor for the polymerization of olefins

IPC classification:
B01J 8/18, C08F 10/00, G05D 7/06
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
APPLICATION DEEMED TO BE WITHDRAWN
EP13728735

METHOD FOR COOLING A GAS-PHASE REACTOR FOR THE POLYMERIZATION OF OLEFINS

IPC classification:
B01J 8/18, C08F 10/00, G05D 7/06
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
GRANT OF PATENT INTENDED
EP14733553

POLYMERIZATION PROCESS IN THE PRESENCE OF AN ANTISTATICALLY ACTING COMPOSITION

IPC classification:
C08F 2/34, C08F 10/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
EP13802400

PROCESS FOR DEGASSING AND BUFFERING POLYOLEFIN PARTICLES OBTAINED BY OLEFIN POLYMERIZATION

IPC classification:
C08F 6/00, C08F 10/00, C08L 23/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
GRANT OF PATENT INTENDED
EP13802401

PROCESS FOR TREATING POLYOLEFIN PARTICLES OBTAINED BY GAS-PHASE POLYMERIZATION

IPC classification:
B29B 13/00, C08F 2/34, C08F 6/00, C08F 6/02, C08F 10/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
GRANT OF PATENT INTENDED
EP13811866

PROCESS FOR COPOLYMERIZING ETHYLENE AND ESTERS OF VINYL ALCOHOL

IPC classification:
C07C 67/54, C08F 2/00, C08F 210/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION IN PROGRESS
EP13818709

PROCESS FOR SEPARATING VINYL ESTERS FROM A GAS STREAM COMPRISING ETHYLENE AND VINYL ESTERS

IPC classification:
C07C 67/54, C08F 2/00, C08F 210/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
PATENT GRANTED
EP14725064

PROCESS FOR THE GAS-PHASE POLYMERIZATION OF ETHYLENE OR ETHYLENE MIXTURES

IPC classification:
C08F 2/34, C08F 110/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP11807890

POLYPROPYLENE COMPOSITION WITH HIGH ELASTICITY AND TRANSPARENCY

IPC classification:
B29C 49/00, B29K 23/00, B29L 31/00, C08L 23/14
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
PATENT GRANTED
EP11804545

PROCESS FOR CONTROLLING THE RELATIVE ACTIVITY OF ACTIVE CENTERS OF CATALYST SYSTEMS COMPRISING AT LEAST ONE LATE TRANSITION METAL CATALYST COMPONENT AND AT LEAST ONE ZIEGLER CATALYST COMPONENT

IPC classification:
C08F 210/16
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
EP11740912

PROCESS AND APPARATUS FOR MIXING AND SPLITTING FLUID STREAMS

IPC classification:
B01F 3/08, B01F 15/00, B01J 4/00, B01J 8/00, C08F 2/01, C08F 2/34, C08F 10/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
EP11748689

PROCESS FOR THE PREPARATION OF A POLYOLEFIN POLYMER WITH IMPROVED WAX DEPOSITION

IPC classification:
C08F 2/18, C08F 10/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
EP11797325

PROCESS FOR THE PREPARATION OF ETHYLENE COPOLYMERS IN THE PRESENCE OF FREE-RADICAL POLYMERIZATION INITIATOR BY COPOLYMERIZING ETHYLENE, A BI- OR MULTIFUNCTIONAL COMONOMER AND OPTIONALLY FURTHER COMONOMERS

IPC classification:
C08F 2/38, C08F 210/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
PATENT GRANTED
EP11797323

PROCESS FOR MONITORING THE POLYMERIZATION OF ETHYLENE OR ETHYLENE AND COMONOMERS IN A TUBULAR-REACTOR AT HIGH-PRESSURES

IPC classification:
C08F 2/00, C08F 10/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
EP14806288

PROCESS FOR SEPARATING COMPONENTS OF A REACTION MIXTURE OBTAINED BY HIGH-PRESSURE POLYMERIZATION OF ETHYLENICALLY UNSATURATED MONOMERS WITH IMPROVED LEVEL CONTROL

IPC classification:
C08F 6/00, C08F 6/10, C08F 6/12, C08F 10/00, C08J 11/02, G01F 23/288, G01N 9/24
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP14809799

PROCESS FOR SEPARATING COMPONENTS OF A REACTION MIXTURE OBTAINED BY HIGH-PRESSURE POLYMERIZATION OF ETHYLENICALLY UNSATURATED MONOMERS

IPC classification:
C08F 6/00, C08F 6/10, C08F 6/12, C08F 10/00, C08J 11/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP14812492

VESSEL FOR SEPARATING COMPONENTS OF A REACTION MIXTURE OBTAINED BY HIGH-PRESSURE POLYMERIZATION OF ETHYLENICALLY UNSATURATED MONOMERS WITH INTEGRATED BURSTING DISCS

IPC classification:
B01J 3/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
PATENT GRANTED
EP15718498

METHODS FOR CONTROLLING ALUMINUM ALKYL FEED TO A SLURRY POLYMERIZATION PROCESS

IPC classification:
C08F 2/14, C08F 10/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP16711821

CONTINUOUS GAS-PHASE POLYMERIZATION PROCESSES

IPC classification:
C08F 10/02
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP15723208

PROCESS FOR ETHYLENE POLYMERIZATION WITH IMPROVED SLURRY PUMP PERFORMANCE

IPC classification:
B01J 19/18, C08F 2/01, C08F 2/18
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP15730197

ETHYLENE POLYMERIZATION PROCESS HAVING IMPROVED HEAT EXCHANGER PERFORMANCE

IPC classification:
C08F 2/01, C08F 2/12, C08F 2/18
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP15731893

PROCESS FOR CONTROLLING AN ETHYLENE POLYMERIZATION PROCESS

IPC classification:
C08F 2/01, C08F 2/12, C08F 2/18
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP15747811

PROCESS FOR ETHYLENE POLYMERIZATION WITH IMPROVED ETHYLENE FEED SYSTEM

IPC classification:
C08F 2/01, C08F 2/12, C08F 2/18
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP15756378

MULTI-REACTOR SLURRY POLYMERIZATION PROCESSES WITH HIGH ETHYLENE PURITY

IPC classification:
C08F 2/00, C08F 2/12, C08F 2/18
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP15804488

PROCESS FOR PREPARING A POLYOLEFIN COMPOSITION

IPC classification:
B29B 7/38, B29B 7/60, B29B 7/72, B29B 9/06
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP15797909

PROCESS FOR SEPARATING COMPONENTS OF A POLYMER-MONOMER MIXTURE OBTAINED BY HIGH-PRESSURE POLYMERIZATION OF ETHYLENICALLY UNSATURATED MONOMERS

IPC classification:
C08F 2/00, C08F 2/01, C08F 6/00
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED
EP15805443

PROCESS FOR PREPARING A POLYOLEFIN COMPOSITION

IPC classification:
B29B 7/38, B29B 7/60, B29B 7/72, B29B 9/06
Applicant:
Basell Polyolefine GmbH
Agent:
Stefan Seelert, Basell Polyolefine GmbH
Status:
EXAMINATION REQUESTED

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