Patents by Inventor Per I. Quist

Per I. Quist 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).

  • Process for producing phenolic foams
    Patent number: 4720510
    Abstract: This invention relates to a process for producing phenolformaldehyde foams, also known as phenolic foams, of improved properties. The inventive feature resides in using a controlled combination of the various components in the curing reaction mixture and in controlling the temperature within the mass of the curing mixture. The process is applicable to production of block or laminated foams. Phenolic foams find increasing use in building applications where their thermal insulation and fire resistant properties are of value.
    Type: Grant
    Filed: May 21, 1985
    Date of Patent: January 19, 1988
    Assignee: BP Chemicals Limited
    Inventors: Gerald C. Marks, Kenneth C. Thomas, Per I. Quist
  • Process for the preparation of phenolic foam
    Patent number: 4648922
    Abstract: The present invention relates to a process and an apparatus for producing phenolic foam laminates with improved surface appearance. The process involves applying pressure on the foam forming mixture through one of its facings by a flexible member. The member is sufficiently flexible to allow continual rise of the foam but also smoothes out any uneven rise under the applied pressure thereby producing a laminate which has a surface immediately below the facing substantially free of any voids, craters or wrinkles.
    Type: Grant
    Filed: February 20, 1985
    Date of Patent: March 10, 1987
    Assignee: BP Chemicals Limited
    Inventors: Gerald C. Marks, Per I. Quist