Patents by Inventor Hiromi Soma

Hiromi Soma 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).

  • Ink for use in ink-jet printer
    Patent number: 4409040
    Abstract: Ink for use in an ink-jet printer, said ink comprising a solution in water of a water-soluble dye, a wetting agent and a compound of the following formula ##STR1## wherein R represents --C.sub.m H.sub.2m+1 or --O--C.sub.m H.sub.2m+1, m represents O or an integer of 1 to 6, and n represents an integer of 1 to 10.
    Type: Grant
    Filed: February 12, 1982
    Date of Patent: October 11, 1983
    Assignee: Dainippon Ink and Chemicals Inc.
    Inventors: Isao Tabayashi, Hiromi Soma, Hiroshi Fukutomi