Patents by Inventor Gilbert Wollaert

Gilbert Wollaert 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).

  • Continuous process for the manufacture of quick-setting phenolic foams
    Patent number: 4424289
    Abstract: A continuous process for manufacturing quick-setting phenolic foams is improved by using as the hardening agent a concentrated, substantially anhydrous solution of boron trioxide, and using as the blowing agent an organic liquid having a boiling point of 20.degree.-80.degree. C. Curing times are shortened and the resultant foam, having uniformly molecularly dispersed therein about 0.25-10.5% by weight of boron, calculated as boric anhydride, has substantially uniform cells, improved fire resistance characteristics and superior mechanical properties.
    Type: Grant
    Filed: May 14, 1982
    Date of Patent: January 3, 1984
    Assignee: Societe Chimique des Charbonnages SA
    Inventors: Nicolas Meyer, Gilbert Wollaert