Patents by Inventor Harley L. Schlotthauer

Harley L. Schlotthauer 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).

  • Plaster consistency reducer
    Patent number: 4237260
    Abstract: An additive for reducing the amount of water necessary in forming a pourable aqueous calcined gypsum slurry, the additive comprising a high potassium salt of a condensation product of naphthalene and sulfonic acid having a molecular weight between about 300 and 3,000. Aqueous plaster slurries containing the additive are pourable, moldable and castable with much less excess water than ordinarily required, resulting in dried cast products of increased strength and other physical property benefits.
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: December 2, 1980
    Assignee: United States Gypsum Company
    Inventors: Robert G. Lange, Harley L. Schlotthauer
  • Plaster composition containing water-reducing agent
    Patent number: 4184887
    Abstract: A plaster composition containing an agent for reducing the amount of water necessary in forming a pourable aqueous calcined gypsum slurry, the agent comprising a high potassium salt of a condensation product of naphthalene and sulfonic acid having a molecular weight between about 300 and 3,000. Aqueous plaster slurries containing the agent are pourable, moldable and castable with much less excess water than ordinarily required, resulting in dried cast products of increased strength and other physical property benefits.
    Type: Grant
    Filed: April 6, 1978
    Date of Patent: January 22, 1980
    Assignee: United States Gypsum Company
    Inventors: Robert G. Lange, Harley L. Schlotthauer