Patents by Inventor Harold E. Duryea

Harold E. Duryea 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).

  • Fire retardant polymer resin
    Patent number: 4820576
    Abstract: A flame-retardant polymer is created by forming a first resin typically by reacting resorcinol with furfural in a ratio of one mole of the former to less than a mole of the latter in the presence of an alkaline catalyst. A resole is then formed by reacting typically phenol with formaldehyde in a ratio of one mole of phenol to more than a mole of the aldehyde in the presence of an alkaline catalyst. The first resin and resole are mixed together with a powered oxyborate compound such as zinc borate and allowed to polymerize to form the polymer.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: April 11, 1989
    Assignee: Fiber Materials, Inc.
    Inventor: Harold E. Duryea