Patents by Inventor Dennis Herbert Fisher

Dennis Herbert Fisher 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).

  • Low profile additives for polyester resin systems based on asymmetric glycols and aromatic diacids
    Patent number: 5932666
    Abstract: This invention is a thermoplastic saturated polyester low profile additive (low profile additive) useful in sheet molding compounds for parts, especially vehicle parts. The additive has a major component derived from aromatic compounds such as terephthalic acid including recycled polyethylene terephthalate. Asymmetrical glycols are an important ingredient and can be used to digest recycled PET to make oligomeric glycols which are reacted with acids having fewer than 12 carbon atoms to make one of the low profile additives of this invention.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: August 3, 1999
    Assignee: Ashland Inc.
    Inventor: Dennis Herbert Fisher
  • Low profile additives for polyester resin systems based on asymmetric glycols and aromatic diacids
    Patent number: 5756554
    Abstract: This invention is a thermoplastic saturated polyester low profile additive (low profile additive) useful in sheet molding compounds for parts, especially vehicle parts. The additive has a major component derived from aromatic compounds such as terephthalic acid including recycled polyethylene terephthalate. Asymmetrical glycols are an important ingredient and can be used to digest recycled PET to make oligomeric glycols which are reacted with acids having fewer than 12 carbon atoms to make one of the low profile additives of this invention.
    Type: Grant
    Filed: February 2, 1996
    Date of Patent: May 26, 1998
    Assignee: Ashland Inc.
    Inventor: Dennis Herbert Fisher