Patents by Inventor Anton J. Van Doorn

Anton J. Van Doorn 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).

  • Manufacture of chipboard having high strength and reduced formaldehyde emission, using a minor amount of protein in combination with low formaldehyde:urea resins
    Patent number: 4282119
    Abstract: Chipboard showing a strongly reduced formaldehyde-emission is prepared on the basis of cellulose-containing material with a urea-formaldehyde or urea-melamine-formaldehyde resin as a binder, wherein said binder contains 0.45 to 0.65 mole of formaldehyde per mole-equivalent of amino groups and to which between 2 and 20% by wt., relative to the resin, of a protein soluble or dispersible in the resin solution has been added. The resin preferably contains between 25 and 45% by wt. of melamine, relative to the combined amount of urea and melamine. The boards have good strength and weather resistance, and have a very low formaldehyde emission.
    Type: Grant
    Filed: December 18, 1979
    Date of Patent: August 4, 1981
    Assignee: Methanol Chemie Nederland V.o.F.
    Inventors: Arie Tinkelenberg, Henricus W. L. M. Vaessen, Kwai W. Suen, Anton J. Van Doorn