Patents by Inventor Akihiko Shimua

Akihiko Shimua 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).

  • Method of preventing corrosion of copper and silver surfaces by corrosive gases
    Publication number: 20100298182
    Abstract: A lubricating grease composition, which comprises a base oil consisting of a mixture of 100 parts by weight of at least one of a perfluoropolyether oil (A), represented by RfO[CF(CF3)CF2O]p(CF2CF2O)qRf (where Rf is a perfluoroalkyl group having 1-5 carbon atoms, p+q=2-200, q/p=0-2, and q may be 0), and a perfluoropolyether oil (B), represented by F(CF2CF2CF2O)sC2F5 (where s=2-100), and 0-100 parts by weight of at least one of a perfluoropolyether oil (C), represented by RfO(CF2CF2O)m(CF2O)nRf (where m+n=3-200 and m:n=10-90:90-10), and a perfluoropolyether oil (D), represented by RfO[CF(CF3)CF2O]a(CF2CF3O)b(CF2O)cRf (where a+b+c=3-200, b is 0 or an integer of 1 or more, and c is an integer of 1 or more), preferably further admixed with a thickening agent, can suppress corrosion of metallic materials by corrosive gases and also has a good heat resistance.
    Type: Application
    Filed: April 19, 2010
    Publication date: November 25, 2010
    Applicant: NOK KLUBER CO., LTD.
    Inventors: Akihiko Shimua, Tetsuhiro Kitahara, Tatsuya Hashimoto