Patents by Inventor Kyouko Nagase

Kyouko Nagase 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).

  • Bislactone compound and a process for producing the same
    Patent number: 5591871
    Abstract: A bislactone compound represented by the general formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each independently represent a hydrogen atom or an alkyl group having 6 or less carbon atoms, and R.sub.3, R.sub.4, R.sub.5 and R.sub.6 each independently represent a hydrogen atom, a hydroxy group or an alkyl group having 6 or less carbon atoms, which is useful as a stabilizer for polymers and as a raw material of a positive type resist:a process for producing the bislactone compound; anda positive resist composition comprising the bislactone compound.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: January 7, 1997
    Assignee: Sumitomo Chemical Co., Ltd
    Inventors: Naoko Suzuki, Hirotoshi Nakanishi, Kyouko Nagase