Patents by Inventor Harold F. Porter, deceased

Harold F. Porter, deceased 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).

  • Production of sodium perborate crystals having improved abrasion resistance
    Patent number: 5215730
    Abstract: A method for improving abrasion resistance of sodium perborate tetrahydrate crystals prepared by reacting sodium metaborate with hydrogen peroxide in an aqueous slurry crystal growth medium, the improvement including highly supersaturating the aqueous slurry crystal growth medium. Also, an agent such as an excess of caustic may be added to the aqueous crystal growth medium to limit the growth rate of individual crystals.
    Type: Grant
    Filed: October 29, 1991
    Date of Patent: June 1, 1993
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Janet M. Rogers, Linda F. Tolbert, Harold F. Porter, deceased, Daniel A. Green