Patents by Inventor Tarja Makela

Tarja Makela has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Preparation of polyolefin based thermoplastic elastomers
    Patent number: 6602959
    Abstract: The invention relates to a method for manufacturing a sealable and peelable polymer blend, in which method polystyrene and an ethylene copolymer are first melt blended and the obtained blend is further mixed with the same ethylene copolymer either by melt blending or dry blending so that the final polymer blend contains 1-50% by weight polystyrene and 99-50% by weight ethylene copolymer. Ethylene copolymer is preferably ethylene/methyl(meth)acrylate, ethylene/ethyl(meth)acrylate, ethylene/butyl(meth)acrylate or ethylene/vinylacetate copolymer.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: August 5, 2003
    Assignee: Optatech Corporation
    Inventors: Torvald Vestberg, Ismo Lehtiniemi, Tarja Mäkelä
  • Preparation of polyolefin based thermoplastic elastomers
    Publication number: 20020183452
    Abstract: The invention relates to a method for manufacturing a sealable and peelable polymer blend, in which method polystyrene and an ethylene copolymer are first melt blended and the obtained blend is further mixed with the same ethylene copolymer either by melt blending or dry blending so that the final polymer blend contains 1-50% by weight polystyrene and 99-50% by weight ethylene copolymer. Ethylene copolymer is preferably ethylene/methyl(meth)acrylate, ethylene/ethyl(meth)acrylate, ethylenelbutyl(meth)acrylate or ethylene/vinylacetate copolymer.
    Type: Application
    Filed: October 23, 2001
    Publication date: December 5, 2002
    Applicant: Optatech Corporation
    Inventors: Torvald Vestberg, Ismo Lehtiniemi, Tarja Makela