Patents by Inventor Rolland S. Ro

Rolland S. Ro 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).

  • Melt-fusible co-polyimide from diamine mixture
    Patent number: 4725642
    Abstract: Melt-fusible copolyimides based on pyromellitic anhydride and two defined classes of aromatic diamines, at least one diamine of each class being incorporated into the polyimide, each diamine class being present in an amount of 10-90 mole percent of the total diamine content (100 mole percent), melt below about 400.degree. C. and can be fabricated into articles, or can be applied to either fibrous or nonfibrous substrates to make prepregs, tapes, etc., which then are shaped into final articles, such as printed circuit boards or aircraft panels.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: February 16, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Thomas P. Gannett, Robert J. Kassal, Rolland S. Ro, Julius Uradnisheck