Patents by Inventor Harry Stitzel

Harry Stitzel 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 polycarboxylated surfactants as dye-leveling agents
    Patent number: 5120326
    Abstract: The present invention relates to a new dye-leveling agent for acid dyes, as well as a blend of the dye-leveling agent with a wetting agent. The acid dye-leveling agent enables polyamide-containing fibers to be evenly dyed without streaking during dyeing of the fibers. The dye-leveling agents are particularly useful with respect to nylon, wool, and silk fibers.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: June 9, 1992
    Assignee: Olin Corporation
    Inventors: Thomas C. Hemling, Harry Stitzel
  • Anionic polycarboxylated surfactants as dye-leveling agents used in combination with a stainblocker for fibers
    Patent number: 5030245
    Abstract: The present invention relates to a process for providing dye leveling and stainblocking characteristics to fibers. The use of specified dye-leveling agents in accordance with the present invention allows the treated fibers to be contacted with an acid dye-stainblocker composition in a single step. The invention is particularly suitable for treating nylon, silk and wool fibers.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: July 9, 1991
    Assignee: Olin Corporation
    Inventors: Thomas C. Hemling, Harry Stitzel
  • Oxidation of vat and sulfur dyes
    Patent number: 4011042
    Abstract: An improvement is disclosed in the oxidation of reduced vat and sulfur dyes to develop their color and improve its fastness in dyed textiles. The improvement is in using an alkali metal bromite as an oxidizing agent for these dyes.
    Type: Grant
    Filed: August 3, 1971
    Date of Patent: March 8, 1977
    Assignee: Olin Corporation
    Inventor: Harry Stitzel