Patents by Inventor David Shankman

David Shankman 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).

  • Combination iron stain and coating for masonry concrete and like material and method of forming the same
    Patent number: 5286289
    Abstract: An iron based stain and an iron coating both concurrently formed through the blending or mixture of predetermined amounts of iron particles with one of a variety of acidic solutions wherein the iron stain is defined by an acidic solution of iron oxide and the iron coating is defined by the collected, non-suspended iron particles in a slurry and/or paste-like state. The exposed surfaces of masonry, concrete, stone and like materials are thereby provided with an architecturally decorative appearance after application of either the iron stain or iron coating.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: February 15, 1994
    Inventor: David Shankman