Patents by Inventor Allan D. Chernack

Allan D. Chernack 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).

  • Patent number: 4171001
    Abstract: A wig and a method of making a weft for use in making the wig wherein 5 to 50 weight percent of a first modacrylic fiber having a denier of 30 to 50 and a shrinkage of 5 to 20 percent at a temperature of 120.degree. C. is blended with 95 to 50 weight percent of the second modacrylic fiber having a denier of 30 to 50 and a shrinkage of at least five percent less than the shrinkage of the first fiber at a temperature of 120.degree. C. The blended fibers are assembled and sewed to form a weft and the weft is then heated to a temperature of 110.degree. to 130.degree. C. for a time period of 1 to 5 minutes to shrink the fibers. This produces an interaction of high shrinking and low shrinking fibers, thus imparting unique properties of cover, manageability and naturalness to the weft.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: October 16, 1979
    Assignee: Monsanto Company
    Inventors: Richard L. Leonard, Allan D. Chernack