Patents by Inventor Chieko Muramoto

Chieko Muramoto 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).

  • Process for producing a copolyester
    Patent number: 4782132
    Abstract: A process for producing a copolymeric polyester, which comprises a first step of preparing a copolymeric oligomer by reacting a starting material oligoester or polyester having repeating units of the formula: ##STR1## wherein R.sub.1 is a divalent aromatic hydrocarbon group having from 6 to 10 carbon atoms, a divalent alicyclic hydrocarbon group having from 4 to 20 carbon atoms or/and a divalent aliphatic hydrocarbon group having from 1 to 40 carbon atoms (provided a hydrogen atom in the aromatic ring of the aromatic hydrocarbon group may be substituted by a halogen atom or an alkyl or alkoxy group having from 1 to 4 carbon atoms), and R.sup.
    Type: Grant
    Filed: January 6, 1987
    Date of Patent: November 1, 1988
    Assignee: Mitsubishi Chemical Industries Limited
    Inventors: Seiichi Nozawa, Osamu Kishiro, Atsushi Kasai, Seigo Okumura, Ken Honma, Chieko Muramoto