Patents by Inventor Lars-Olof Pietila

Lars-Olof Pietila 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).

  • Patent number: 6054543
    Abstract: Amorphous and impact resistant co/ter-polymer made from olefins and aryl-substituted cyclic monomers by polymerizing using a catalyst, wherein the substituent is a phenyl- or indanyl-group and the catalyst is a metallocene-catalyst. Preferably said aryl-substituted cyclic monomer is phenyl-norbomene (5-phenyl-bicylo-2,2,1-hept-2-ene) or indanyl-norbomene (1,4-methano-1,4,4a,9a-tetrahydrofluorence).
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: April 25, 2000
    Assignee: Optatech Corporation
    Inventors: Christer Hans Bergstrom, Jukka Seppala, Juhana Ruotoistenmaki, Tapio Hase, Sari Paavola, Lars-Olof Pietila, Lisbeth Ahjopalo
  • Patent number: 5929168
    Abstract: The present invention concerns polymer blends and processes for the preparation thereof. The present blends contain a) 5 to 95 parts by weight of poly(2,6-dimethyl-1,4-phenylene)ether, b) 95 to 5 parts by weight of a second polymer which is immiscible therewith, and c) a component (a compatibilizer) which enhances the compatibility of the polymers. According to the invention the component enhancing the compatibility of the polymers comprises 0.1 to 10%, preferably about 1.5 to 10%, calculated on basis of the total weight of components a and b, of at least one compound C, which has the formulaA.sub.i --B.sub.j IwhereinA stands for a group which contains at least one ring with 3 to 7 members, capable of forming ring-to-ring interactions with the phenyl rings of poly(2,6-dimethyl-1,4-phenylene)ether,B is a polar group,i is an integer 1 to 20, andj is an integer 0 to 20,whereati+j is greater than or equal to 2,the melting point of compound C is above 50.degree. C. and the boiling point thereof above 200.degree.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: July 27, 1999
    Assignee: Optatech, Corporation
    Inventors: Olli Ikkala, Lars-Olof Pietila, Riitta Holsti-Miettinen, Nikitas Katsaras, Maaria Selantaus, Heidi Osterholm, Christer Bergstrom
  • Patent number: 5783111
    Abstract: Compositions are disclosed comprising electrically conducting polyaniline and particular substituted aromatic compounds that simultaneously form hydrogen bonds and ring-ring interactions with, respectively, the NH-groups and the six-membered rings of the conducting polyanilines. The present conducting polyaniline compositions show drastically enhanced processibility and their blends with insulating or semiconducting materials exhibit significantly improved electrical properties.
    Type: Grant
    Filed: January 4, 1996
    Date of Patent: July 21, 1998
    Assignees: Uniax Corporation, Neste Oy
    Inventors: Olli Ikkala, Lars-Olof Pietila, Yong Cao, Alejandro Andreatta