Exxon Chemical Patents, Inc.

Other

John R Griffin

Michael E Muhle

Marc L DeChellis

Raymond H Martin

Ugo S Garganese

Agapios Kyriacos Agapiou

Gary Thomas Renola

Dwayne Lee Litteer

Patrick Brant

The present invention relates to a continuous process for the polymerization of olefin(s) utilizing a metallocene catalyst or catalyst system in a continuous slurry or gas phase polymerization process for polymerizing monomer(s). The invention is more particularly drawn to a gas phase polymerization process for polymerizing one or more olefin(s), alone or in combination, in the presence of a metallocene catalyst system in a fluidized bed reactor, preferably operating in a condensed mode.

Olefin polymerization process with little or no scavenger present

The present invention relates to a continuous process for the polymerization of olefin(s) utilizing a metallocene catalyst or catalyst system in a continuous slurry or gas phase polymerization process. The invention is more particularly drawn to a gas phase polymerization process for polymerizing one or more olefin(s) in the presence of a metallocene catalyst system in a fluidized bed reactor in the absence of or with a low mount of a scavenger.

Polymerization process

The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in the presence of a metallocene catalyst in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid phase.

Process for polymerizing monomers in fluidized beds

The invention is directed toward polymerizing or copolymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins in a gas phase reactor having a fluidized bed and a fluidizing medium such that the fluidizing medium entering the reactor comprises a gas and a liquid phase.

The invention is directed toward polymerizing alpha-olefins either alone or in combination with one or more other alpha-olefins utilizing a bulky ligand transition metal catalyst in a gas phase fluidized bed polymerization reactor operating in condensed mode.

A method of fabricating a custom denture using a preformed tooth arch and a custom formed denture base, attaching these units with a self polymerizing plastic, using a plasterless keying articulator in conjuction with an occlusal translator thereby completing the entire fabrication of a custom denture on the articulator without the conventional waxup, flasking, processing which is the present state of the art.

Custom denture fabrication technic

A denture occlusal mounting translator to transfer the patient's occlusal measurements in the exact location by the positioning of the model to set artificial teeth to the patient's interoral plane, eliminating the need of a wax occlusal rim.

Denture occlusal mounting translator

A dental articulator for mounting stone models without the need of plaster, by the use of a flexible model former with a rim around its edge and a square raised nipple, a ferromagnetic disc, magnets and a square keying device on the articulator. This method permits rapid articulation. The models may also be removed and replaced at will while maintaining the previously established centric.

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Baytown, TX, United States of America

John R Griffin