Patents by Inventor Yoshie Hiramatsu

Yoshie Hiramatsu 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).

  • Sulfur-containing aliphatic acrylic compound, crosslinked polymer article, and lens
    Patent number: 4939218
    Abstract: A sulfur-containing aliphatic acrylic compound represented by the following general formula [I] ##STR1## wherein R.sup.1 represents a hydrogen atom or a methyl group, R.sup.2 represents an aliphatic hydrocarbon group having 1 to 8 carbon atoms, and R.sup.3 represents an aliphatic hydrocarbon group having 1 to 8 carbon atoms which may contain oxygen or sulfur in the main chain; a crosslinked polymer article obtained by polymerizing and curing a monomeric mixture composed of 100 to 60% by weight of at least one sulfur-containing aliphatic acrylic compound represented by the general formula [I] and 0 to 40% by weight of another copolymerizable monomer containing an ethylenic bond in a mold together with a radical initiator; a lens composed of the cross-linked polymer article thereof; and a process for producing a crosslinked polymer article thereof.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: July 3, 1990
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Takao Kawaki, Makoto Kobayashi, Osamu Aoki, Yoshie Hiramatsu