Patents by Inventor Shigetaka Numasawa

Shigetaka Numasawa 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).

  • Lactone compound
    Patent number: 6992197
    Abstract: A novel monomer compound having a lactone moiety of the present invention can be converted into polymers usable as resist materials with excellent properties, etc., and an alcohol compound having a lactone moiety of the invention is useful as a material for the monomer compound. The compounds are represented by the following general formula [1]: wherein one of R1 and R2 represents a hydrogen atom, an acryloyl group, or a methacryloyl group, and the other represents an alkyl group; R3 and R4 independently represent a hydrogen atom or an alkyl group; R5 and R6 both represent a hydrogen atom or are combined to form a methylene chain that may have an alkyl group; and R7 and R8 independently represent a hydrogen atom or a methyl group.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: January 31, 2006
    Assignee: Takasago International Corporation
    Inventors: Junji Nakamura, Shigetaka Numasawa, Hiroyuki Kenmochi, Yoji Hori
  • Novel lactone compound
    Publication number: 20050032887
    Abstract: A novel monomer compound having a lactone moiety of the present invention can be converted into polymers usable as resist materials with excellent properties, etc., and an alcohol compound having a lactone moiety of the invention is useful as a material for the monomer compound. The compounds are represented by the following general formula [1]: wherein one of R1 and R2 represents a hydrogen atom, an acryloyl group, or a methacryloyl group, and the other represents an alkyl group; R3 and R4 independently represent a hydrogen atom or an alkyl group; R5 and R6 both represent a hydrogen atom or are combined to form a methylene chain that may have an alkyl group; and R7 and R8 independently represent a hydrogen atom or a methyl group.
    Type: Application
    Filed: June 10, 2004
    Publication date: February 10, 2005
    Applicant: Takasago International Corporation
    Inventors: Junji Nakamura, Shigetaka Numasawa, Hiroyuki Kenmochi, Yoji Hori