Patents by Inventor Gottlieb Bartak

Gottlieb Bartak 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).

  • Liquid for waterproofing a masonry structure
    Patent number: 4263161
    Abstract: A liquid for waterproofing a masonry structure contains 20-50% of a diisocyanate and to-50% of a solvent mixture consisting of 40-60% of ethylene glycol monoethyl ether acetate or methylisobutylketone and 60-40% of toluene, all percentages being by weight.
    Type: Grant
    Filed: August 27, 1979
    Date of Patent: April 21, 1981
    Inventor: Gottlieb Bartak