Patents by Inventor Takenao Yamamura

Takenao Yamamura 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).

  • Photocationically curable compositions and process for producing the same
    Patent number: 6121342
    Abstract: A photocationically curable composition and a process for producing the same are provided. The composition comprises, as the essential component, a condensation product having an oxetanyl group, which is a condensation product of a hydrolyzate of an organic silane compound having an oxetanyl group and being represented by the formula below, or of a mixture of said organic silane compound and a reactive silicone having a siloxane linkage-forming group: ##STR1## wherein R.sup.0 means an organic functional group having an oxetanyl group, and X means a hydrolyzable group. The composition forms cured coating films of high surface hardness, and is useful as hard coating agents.
    Type: Grant
    Filed: January 7, 1999
    Date of Patent: September 19, 2000
    Assignee: Toagosei Co., Ltd.
    Inventors: Hiroshi Suzuki, Akira Sumi, Takenao Yamamura