Patents by Inventor Charles S. Merris, Jr.

Charles S. Merris, Jr. 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).

  • Process for preparation of high opacity precipitated calcium carbonate by reacting sodium carbonate with calcium hydroxide
    Patent number: 5364610
    Abstract: In the process for making calcium carbonate by the double decomposition reaction of sodium carbonate and calcium hydroxide in aqueous reaction medium the improvement of producing calcium carbonate having a scalenohedral particle shape and a rosette aggregate structure comprising adding said sodium carbonate in more than one stream to said calcium hydroxide over a period of 1 to 8 hours and maintaining said reaction medium in the range of 80.degree. to 140.degree. F.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: November 15, 1994
    Assignee: P. H. Glatfelter Company
    Inventor: Charles S. Merris, Jr.