Patents by Inventor Ling Yeh

Ling Yeh 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).

  • End identifier for multidye yarn
    Patent number: 5066308
    Abstract: A method of distinguishing two or more variant dye fibers in greige form is disclosed. The technique involves adding sufficient pigment to one of the fibers to make it visible to the eye.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: November 19, 1991
    Assignee: BASF Corporation
    Inventors: Ling Yeh, Hugh G. Harrelson, Andrew M. Coons, III
  • Flame retardant fibers for textile use
    Patent number: 5024869
    Abstract: The present invention pertains to thermoplastically processable synthetic polymers and fibers produced therefrom which are rendered flame retardant by certain organic pigments which are substantially unreactive with the polymer. The flame retardant materials include:(i) carbon black pigment;(ii) ##STR1## (iii) a chromium 1:2 complex azo dye wherein said dye has the following formula: ##STR2## (iv) ##STR3## wherein: m, n, p, and q are each either 0 or an integer from 1 to about 4; or,(v) mixtures thereof.
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: June 18, 1991
    Assignee: BASF Corporation
    Inventors: Ling Yeh, Hugh G. Harrelson, Jr.
  • Flame retardant fibers for textile use
    Patent number: 4853272
    Abstract: The present invention pertains to thermoplastically processable synthetic polymers and fibers produced therefrom which are rendered flame retardant by certain organic pigments which are substantially unreactive with the polymer. The flame retardant materials include:(i) carbon black pigment; ##STR1## (iii) a chromium 1:2 complex azo dye wherein said dye has the following formula: ##STR2## wherein: m, n, p, and q are each either O or an integer from 1 to about 4; or,(v) mixtures thereof.
    Type: Grant
    Filed: December 9, 1987
    Date of Patent: August 1, 1989
    Assignee: BASF Corporation
    Inventors: Ling Yeh, Hugh G. Harrelson, Jr.