Patents by Inventor Vera Grinevskaya

Vera Grinevskaya 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).

  • Process for preparing fluoropolymer
    Patent number: 6469217
    Abstract: The polymerization initiator-containing solution obtained by mixing a specific perfluorodicarboxylic acid fluoride (A) with CsF in an aprotic polar solvent with stirring to conduct reaction and thereby form a polymerization initiator (B) and then allowing the reaction solution to stand for not less than 72 hours at a temperature of 0 to 30° C. A polymerization initiator-containing solution comprises a specific polymerization initiator (B′) and an aprotic polar solvent. The process for preparing a perfluoropolyether comprises polymerizing hexafluoropropylene oxide in the presence of the polymerization initiator-containing solution.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: October 22, 2002
    Assignee: Nippon Mektron, Ltd.
    Inventors: Satoru Saito, Haruyoshi Tatsu, Vera Grinevskaya
  • Process for preparing fluoropolymer
    Publication number: 20010050351
    Abstract: The polymerization initiator-containing solution of the first invention is obtained by mixing a specific perfluorodicarboxylic acid fluoride (A) with CsF in an aprotic polar solvent with stirring to conduct reaction and thereby form a polymerization initiator (B) and then allowing the reaction solution to stand for not less than 72 hours at a temperature of 0 to 30° C. The polymerization initiator-containing solution of the second invention comprises a specific polymerization initiator (B′) and an aprotic polar solvent. The process for preparing a perfluoropolyether according to the invention comprises polymerizing hexafluoropropylene oxide in the presence of the polymerization initiator-containing solution.
    Type: Application
    Filed: April 30, 2001
    Publication date: December 13, 2001
    Applicant: NIPPON MEKTRON, LTD.
    Inventors: Satoru Saito, Haruyoshi Tatsu, Vera Grinevskaya