Patents by Inventor Robert N. Ammeraal

Robert N. Ammeraal 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 making a steroid water soluble
    Patent number: 5376641
    Abstract: A complex of branched beta cyclodextrin and steroid is formed by mixing a steroid and a branched beta cyclodextrin together in water for a period of about 4 to 24 hours under ambient conditions. The solubility of the steroid is increased about 95 times by employing the complex.
    Type: Grant
    Filed: July 16, 1993
    Date of Patent: December 27, 1994
    Assignee: American Maize Technology, Inc.
    Inventor: Robert N. Ammeraal
  • Water soluble branched beta cyclodextrin steroid complex
    Patent number: 5229370
    Abstract: A complex of branched beta cyclodextrin and steroid is formed by mixing a steroid and a branched beta cyclodextrin together in water for a period of about 4 to 24 hours under ambient conditions. The solubility of the steroid is increased about 95 times by employing the complex.
    Type: Grant
    Filed: July 27, 1992
    Date of Patent: July 20, 1993
    Inventor: Robert N. Ammeraal
  • Branched cyclodextrins
    Patent number: 5032182
    Abstract: Branched cyclodextrins are produced by the pyrolysis of cyclodextrins. The temperature range is 135.degree. C. to 220.degree. C. using equipment suitable for making British gum and other starch dextrins.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: July 16, 1991
    Assignee: American Maize-Products Company
    Inventors: Robert N. Ammeraal, Edward D. DeBoer
  • Separation and purification of branched beta cyclodextrins
    Patent number: 5007967
    Abstract: Branched beta cyclodextrins are purified and separated sequentially from solution by passing a solution containing branched beta cyclodextrins through a column containing a matrix on which an inclusion compound has been bound. The process is carried out under ambient conditions at a neutral pH.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: April 16, 1991
    Assignee: American Maize-Products Company
    Inventor: Robert N. Ammeraal
  • Separation and purification of gamma cyclodextrin
    Patent number: 4904306
    Abstract: Gamma cyclodextrin is separated and purified by a process that first precipitates the gamma cyclodextrin from solution using a gamma cyclodextrin complexant followed by a step of removing the complexant from the precipitate and then passing the resulting solution containing the gamma cyclodextrin through a chromatographic material from which the gamma cyclodextrin is eluted.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: February 27, 1990
    Assignee: American Maize-Products Company
    Inventor: Robert N. Ammeraal
  • Method for making branched cyclodextrins and product produced thereby
    Patent number: 4904307
    Abstract: Branched cyclodextrins are produced by the pyrolysis of crystalline cyclodextrins. The temperature range is 135.degree. C. to 220.degree. C. using equipment suitable for making British gum and other starch dextrins.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: February 27, 1990
    Assignee: American Maize-Products Company
    Inventors: Robert N. Ammeraal, Edward D. DeBoer
  • Purification and separation of branched beta-cyclodextrins
    Patent number: 4840679
    Abstract: A method for separating and purifying branched beta-cyclodextrins from aqueous solution. The process entails adding a beta-cyclodextrin complexant to a starting solution, recovering the precipitate so formed, dissolving the resulting precipitate in water, adding a second dose of beta-cyclodextrin complexant to the solution and recovering branched beta-cyclodextrin from the resulting liquor.
    Type: Grant
    Filed: July 8, 1987
    Date of Patent: June 20, 1989
    Assignee: American Maize-Products Company
    Inventors: Robert N. Ammeraal, Allan R. Hedges, David J. Gottneid
  • Process for producing and separating cyclodextrins
    Patent number: 4738923
    Abstract: The present invention is directed to the process of producing and separating cyclodextrins and in particular to the process of using food grade hydrocarbons that include a six membered ring having some unsaturation and ten carbon atoms such as limonene and the like natural oils.
    Type: Grant
    Filed: May 20, 1986
    Date of Patent: April 19, 1988
    Assignee: American Maize-Products Company
    Inventor: Robert N. Ammeraal