Patents by Inventor Ari Salmela

Ari Salmela 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).

  • Liquid crystalline copoly(ester-imide)s and a process for the preparation thereof
    Patent number: 5843541
    Abstract: The present invention relates to liquid crystalline copoly(ester-imides) and a process for the preparation thereof. In particular, the invention relates to liquid crystalline copoly(esteri-imides) comprising structural units derived from N-(3'-hydroxyphenyl)-trimellitic acid imide or N-(4'-carboxyphenyl)trimellitic acid imides optionally in combination with aromatic dicarboxylic acids, dioles or hydroxy acids. The invention also concerns the use of these copolymers in polymer blends, in moulded articles, in fibres, filaments and sheets.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: December 1, 1998
    Assignee: OPTATECH Corporation
    Inventors: Heli Alanko, Hans Kricheldorf, Ari Salmela