Patents by Inventor Michael A. Barcroft

Michael A. Barcroft 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 improved phenolic foams from phenolic resole resins
    Patent number: 5489619
    Abstract: This invention relates to novel blowing agents comprising a blend of (A) perfluoro- or partially fluorinated-(cyclo)alkanes and (B) one or more of hydrogenated chlorofluorocarbons, hydrogenated fluorocarbons and a low boiling (cyclo)alkane. These blowing agents perform as well as the conventionally used CFC's but are user friendly and do not have the adverse effect of depletion of the ozone layer. These blowing agents are particularly suited for use in producing foams from synthetic polymers and resins, especially phenolic foams of very low and stable thermal conductivity.
    Type: Grant
    Filed: March 14, 1994
    Date of Patent: February 6, 1996
    Assignee: BP Chemicals Limited
    Inventors: Michael A. Barcroft, Kathryn S. Gould, David R. Johnstone, David C. Wilson