Patents by Inventor George Y. Lei

George Y. Lei 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).

  • Anionic dyeing of novoloid fibers
    Patent number: 3993442
    Abstract: Compositions are disclosed for dyeing cross-linked novolac fibers, and blends thereof, using anionic dyes and premetallized dyes.
    Type: Grant
    Filed: September 19, 1974
    Date of Patent: November 23, 1976
    Assignee: The Carborundum Company
    Inventors: James Economy, George Y. Lei
  • Cationic dyeing of novoloid fibers
    Patent number: 3967925
    Abstract: Compositions are disclosed for dyeing cross-linked novolac fibers, and blends thereof with aromatic polyamides, using cationic dyes.
    Type: Grant
    Filed: September 19, 1974
    Date of Patent: July 6, 1976
    Assignee: The Carborundum Company
    Inventors: James Economy, George Y. Lei
  • Dyeing novoloid fibers with disperse dyes
    Patent number: 3942947
    Abstract: Compositions are disclosed for dyeing cross-linked novolac fibers, and blends thereof, using disperse dyes.
    Type: Grant
    Filed: September 19, 1974
    Date of Patent: March 9, 1976
    Assignee: The Carborundum Company
    Inventors: James Economy, George Y. Lei