Patents by Inventor Griffith Thomas

Griffith Thomas 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 ingredients for detergents and soap powders from alkali phosphates
    Patent number: 4707344
    Abstract: A process for production of alkali metal polyphosphates and/or pyriphosphates from an alkali metal orthophosphate comprises acidifying said orthophosphate with sulphuric acid, and then either(a) heating the reaction mixture to produce the desired products, and recovering said products from the reaction mixture, or(b) separating an intermediate from the reaction mixture, and heating the intermediate to form a desired product.The products are suitable for incorporation into detergents and soap powders.
    Type: Grant
    Filed: January 11, 1985
    Date of Patent: November 17, 1987
    Inventor: Griffith Thomas
  • Alkaline processing of naturally occurring calcium aluminium and iron phosphates
    Patent number: 4668487
    Abstract: A process for production of alkali metal phosphates from material containing calcium, iron and aluminium phosphates, for example naturally occurring phosphate rocks, involves calcining the material with alkali metal carbonates to produce alkali metal phosphates, which are then leached from the calcined product under conditions that yield relatively concentrated solutions.
    Type: Grant
    Filed: October 16, 1985
    Date of Patent: May 26, 1987
    Inventor: Griffith Thomas
  • Extracting soluble phosphates from naturally occurring iron and aluminium phosphates using solutions of alkali metal carbonates and hydroxides
    Patent number: 4609535
    Abstract: A process for production of alkali metal phosphates from material containing iron and aluminium phosphates comprises leaching the said material with alkali metal carbonate solution to produce a leachate containing dissolved phosphates, and recovering alkali metal phosphates from the leachate. In a preferred embodiment, the carbonate leach is followed by further leaching wth alkali metal hydroxide to effect further dissolution of phosphates from the material, before recovering alkali metal phosphates from the leachate.
    Type: Grant
    Filed: August 1, 1984
    Date of Patent: September 2, 1986
    Inventor: Griffith Thomas