Patents by Inventor Frank Tieh-Yin Fu

Frank Tieh-Yin Fu 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).

  • Oligomeric esteramides containing pendant hindered amine groups
    Patent number: 4439565
    Abstract: Oligomeric esteramides having recurring structural units of the formula ##STR1## where G is a hindered amine radical of formula I or II ##STR2## in which R.sup.1 is hydrogen or alkyl having 1 to 4 carbon atoms, R.sup.2 is hydrogen, alkyl having 1 to 12 carbon atoms, allyl, benzyl, acetyl, acryloyl or cyano, Z.sub.1 is a direct bond, --NHCH.sub.2 CH.sub.2 --, --NHCH.sub.2 CH.sub.2 CH.sub.2 -- or --OCH.sub.2 CH.sub.2 --, Z.sub.2 is ethylene or trimethylene, E is a divalent aliphatic, aromatic or alicyclic radical and L is unsubstituted or substituted alkylene, are useful light stabilizers for plastics.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: March 27, 1984
    Assignee: Ciba-Geigy Corporation
    Inventors: Roland A. E. Winter, Roger F. Malherbe, Frank Tieh-Yin Fu