Patents by Inventor Katari S. Raju

Katari S. Raju 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).

  • Molded composite polyester articles having improved thermal shock resistance
    Patent number: 5177127
    Abstract: A molded article such as a bathroom sink having improved thermal shock resistance is produced by molding the article from a composite unsaturated polyester resin in which the resin in the cured state has an HDT value in the range of about 68.degree. C.-78.degree. C.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: January 5, 1993
    Assignee: Reichhold Chemicals, Inc.
    Inventor: Katari S. Raju
  • Chain-stopped unsaturated polyester resins
    Patent number: 5118783
    Abstract: A monofunctional alcohol or acid is used to chain stop a condensation reaction for preparing a low molecular weight unsaturated polyester resin. The monofunctional acid removes terminal hydroxy groups and replaces them with hydrocarbon groups. The monofunctional alcohol removes terminal carboxy groups and replaces them with hydrocarbon groups. The resulting polyester resins having improved hydrolytic stability. These chain stopped unsaturated polyester resins can be further modified with hydroxy acrylates, other hydroxy terminated polyesters, and diisocyanates to produce resins with excellent water resistance and physical properties for various applications, such as marble/onyx resins, sheet molding compounds, bulk molding compounds and resin transfer molding resins, gel coats, and bowling ball resins.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: June 2, 1992
    Assignee: Reichhold Chemicals, Inc.
    Inventor: Katari S. Raju