Patents by Inventor John R. Holsten

John R. Holsten 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).

  • Method for dyeing fibrous materials and dye assistant relating to the same
    Patent number: 5437690
    Abstract: A method for dyeing fibrous material is provided. The method includes contacting a fibrous material with a dyebath comprising a mixture of a dye assistant and a dye soluble or dispersed with the dye assistant in the dyebath. The dye assistant comprises a N-alkyl substituted aromatic sulfonamide. The dye assistant of the present invention can be advantageously utilized for dyeing difficult to dye fibers such as aromatic polyamide fibers, polybenzimidazole fibers and aromatic polyimide fibers.
    Type: Grant
    Filed: May 25, 1994
    Date of Patent: August 1, 1995
    Assignee: Springs Industries, Inc.
    Inventors: Melvin A. Caldwell, John R. Holsten
  • Method for dyeing fibrous materials
    Patent number: 5427589
    Abstract: A method for dyeing fibrous material is provided. The method includes contacting a fibrous material with a dyebath comprising a mixture of a dye assistant and a dye soluble or dispersed with dye assistant in the dyebath. The dye assistant comprises a salt of a low molecular weight aromatic sulfonic acid, and can include a low molecular weight surfactant. The dye assistant of the present invention can be advantageously utilized for dyeing difficult to dye fibers such as aromatic polyamide fibers, polybenzimidazole fibers and aromatic polyimide fibers.
    Type: Grant
    Filed: March 3, 1993
    Date of Patent: June 27, 1995
    Assignee: Springs Industries, Inc.
    Inventors: John R. Holsten, Moses Smith, Jr.
  • Method for dyeing aromatic polyamide fibrous materials: N,N-diethyl(meta-toluamide) dye carrier
    Patent number: 5207803
    Abstract: A method for dyeing fibrous material is provided. The method includes contacting a fibrous material with a carrier and a dye soluble or dispersed with the carrier in a dyebath. The carrier comprises an N-substituted aromatic carbonamide or an N,N-disubstituted aromatic carbonamide or mixture thereof. The carrier system of the present can be advantageously utilized for improving dye and flame resistant properties of difficult to dye fibers such as aromatic polyamide fibers, polybenzimidazole fibers and aromatic polyimide fibers.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: May 4, 1993
    Assignee: Springs Industries
    Inventors: John R. Holsten, Nigel E. Neely