Patents by Inventor Richard R. Crawford

Richard R. Crawford 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 separating 3-hydroxy steroids or sterols from mixtures such as lipids
    Patent number: 4425275
    Abstract: A process for separating 3-hydroxy steroids from sterol concentrate mixtures by combining a solution of the sterol-containing mixture in a cosolvent of a dialkyl ketone and a low molecular weight alcohol with a slurry or solution of calcium bromide. The complexed sterols are isolated by filtration and the sterols can be subsequently liberated from the complex by treatment with an aqueous/alcohol and isolated by filtration and drying. The complexed sterols are of large particle size which allows rapid filtration.
    Type: Grant
    Filed: July 12, 1982
    Date of Patent: January 10, 1984
    Assignee: Eastman Kodak Company
    Inventors: Richard R. Crawford, William P. Blum, David C. Naramore
  • Conversion of fatty acid esters to fatty acids
    Patent number: 4179457
    Abstract: A process is disclosed for converting lower alkyl esters of fatty acids to the corresponding fatty acids by the steps of sequentially dissolving the esters in a solvent, saponifying the solution, acidifying the solution to a pH of between about 5 and about 8, distilling to remove solvents, and again acdifying the solution to a pH of between about 1 and about 4. The acids may then be removed by washing.
    Type: Grant
    Filed: December 29, 1978
    Date of Patent: December 18, 1979
    Assignee: Eastman Kodak Company
    Inventor: Richard R. Crawford