Patents by Inventor Philip W. Staal

Philip W. Staal 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).

  • Method for the preparation and recovery of alkali metal citrates
    Patent number: 5041645
    Abstract: Alkali metal citrates are prepared by the addition of an alkaline alkali metal base or salt to citric acid solutions and recovered in solid form by the addition of a C.sub.1 to C.sub.5 alcohol to the solution to cause precipitation.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: August 20, 1991
    Assignee: Haarmann & Reimer Corp.
    Inventors: Alexander Alon, Philip W. Staal
  • Method for the preparation of liquid aluminum citrate
    Patent number: 4447364
    Abstract: Disclosed is a method for the preparation of a stable solution of aluminum citrate. The method involves combining a solution of aluminum chloride with a solution of citric acid while maintaining vigorous agitation. After formation of the aluminum citrate solution, sufficient alkali metal or ammonium hydroxide is added to increase the pH to a level of 5.5 to 7.5. During addition of the base, the agitation is continued and the temperature of the solution is maintained at a level of from 20.degree. C. to 90.degree. C.
    Type: Grant
    Filed: January 27, 1983
    Date of Patent: May 8, 1984
    Assignee: Miles Laboratories, Inc.
    Inventor: Philip W. Staal