Patents by Inventor John Maskal

John Maskal 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).

  • Magnesium hydroxide-containing paper
    Patent number: 3941610
    Abstract: Paper possessing outstanding opacity, whiteness and gloss characteristics containing a magnesium hydroxide pigment having about 1 to 5 weight per cent calcium ion concentration in solid solution therewith and methods of manufacturing such paper are provided. The pigment is contained either as a paper filler or as a component of a coating pigment composition.
    Type: Grant
    Filed: May 17, 1971
    Date of Patent: March 2, 1976
    Assignee: The Dow Chemical Company
    Inventors: John Maskal, Ivan M. Thompson, Henrik R. Heikel