Patents by Inventor Thomas Emory Ricketts

Thomas Emory Ricketts 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).

  • Preparation of d-2-amino-1-butanol salts
    Patent number: RE29588
    Abstract: A racemic mixture of dl-2-amino-1-butanol is resolved with separation of the d-2-amino-1-butanol by crystallizing as a salt with L(+)-tartaric acid from an essentially anhydrous solution in ethanol or methanol. The salt is decomposed with calcium hydroxide to yield the d-2-amino-1-butanol. Water may be added to the residual anhydrous solution to separate the l-2-amino-1-butanol. Other listed volatile solvents may be present in the anhydrous ethanol or methanol without inhibiting the sharp separation.
    Type: Grant
    Filed: December 2, 1971
    Date of Patent: March 21, 1978
    Assignee: American Cyanamid Company
    Inventors: Imre Aurel Halmos, Thomas Emory Ricketts