Patents by Inventor Thomas Earl Cisar

Thomas Earl Cisar 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).

  • Extruded foam product with reduced surface defects
    Patent number: 6632382
    Abstract: The present invention generally relates to processes for preparing extruded foam products and more particularly to a process for producing such products wherein surface defects are minimized. There has been a movement to replace conventional halo-carbon blowing agents in favor of purportedly more environmentally safe halo-carbon free blowing agents such as carbon dioxide, nitrogen, argon, water, air, nitrogen, and helium. However, these halo-carbon free blowing agents, in particular carbon dioxide, have higher foaming rates and higher volatility leading to greater surface defects in the extruded foam. The present invention employs polyethylene wax to reduce or eliminate the occurrence of surface defects where halo-carbon free blowing agents are employed in an extruded foam manufacture process.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: October 14, 2003
    Assignee: Owens-Corning Fiberglas Technology, Inc.
    Inventors: Larry Michael Miller, Raymond Marshall Breindel, Mitchell Zane Weekley, Thomas Earl Cisar
  • Extruded foam product with 134A and alcohol blowing agent
    Publication number: 20020028855
    Abstract: The present invention generally relates to methods for preparing extruded foam products and more particularly to a methods for producing such products with a blowing agent containing 134a and an alcohol.
    Type: Application
    Filed: April 30, 2001
    Publication date: March 7, 2002
    Inventors: Larry Michael Miller, Raymond Marshall Breindel, Mitchell Zane Weekley, Thomas Earl Cisar, Kerry Jerome Prince
  • Extruded foam product with 134a and alcohol blowing agent
    Patent number: 6350789
    Abstract: The present invention generally relates to methods for preparing extruded foam products and more particularly to a methods for producing such products with a blowing agent containing 134a and an alcohol.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: February 26, 2002
    Assignee: Owens Corning Fiberglas Technology, Inc.
    Inventors: Larry Michael Miller, Raymond Marshall Breindel, Mitchell Zane Weekley, Thomas Earl Cisar, Kerry Jerome Prince
  • Extruded foam product with 134a and alcohol blowing agent
    Patent number: 6274640
    Abstract: The present invention generally relates to methods for preparing extruded foam products and more particularly to a methods for producing such products with a blowing agent containing 134a and an alcohol.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: August 14, 2001
    Assignee: Owens Corning Fiberglas Technology, Inc.
    Inventors: Larry Michael Miller, Raymond Marshall Breindel, Mitchell Zane Weekley, Thomas Earl Cisar, Kerry Jerome Prince
  • Process for producing extruded foam products having polystyrene blends with high levels of CO2 as a blowing agent
    Patent number: 6268046
    Abstract: In one embodiment, the present invention relates to a process for preparing foam board or sheet including the steps of (A) forming a foamable mixture of (1) a major amount of a styrenic polymer having a high melt index, (2) a minor amount of a low melt index styrenic polymer, and (3) a blowing agent containing a major amount of carbon dioxide under a pressure sufficient to prevent prefoaming of the mixture, and (B) foaming the mixture into a region of reduced pressure to form a foam product.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: July 31, 2001
    Assignee: Owens Corning Fiberglas Technology, Inc.
    Inventors: Larry Michael Miller, Thomas Earl Cisar, Raymond Marshall Breindel, Mitchell Zane Weekley