Patents Examined by Christine A. Skone
  • Marking ink composition
    Patent number: 4822417
    Abstract: A marking ink composition comprising a colorant, an organic solvent, a resin soluble in said organic solvent and a decaglycerol fatty acid ester represented by the general formula (1): ##STR1## wherein R is an acyl group or a hydrogen atom. The marking ink composition of the present invention exhibits an excellent resistance to drying of a nib of a pen so that the nib undergoes no significant drying even when the pen is left to stand with its cap removed.
    Type: Grant
    Filed: March 5, 1987
    Date of Patent: April 18, 1989
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Yuichi Kobayashi, Satoshi Saito