Patents by Inventor Ryohei Ehara

Ryohei Ehara 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).

  • Composite paper
    Patent number: 5053268
    Abstract: A composite paper suitable for use as writing paper, printing paper or copying paper is disclosed which includes a synthetic resin film having a thickness of 12-30 .mu.m, and a paper sheet laminated on each side of the synthetic resin film and having a Bekk smoothness of 60-120 seconds, a density of 0.8-1.0 g/cm.sup.3, a degree of sizing of 0.5-1.5 seconds and a thickness of 20-25 .mu.m.
    Type: Grant
    Filed: November 28, 1989
    Date of Patent: October 1, 1991
    Assignee: Somar Corporation
    Inventors: Ryohei Ehara, Masatoshi Tomiki