Patents by Inventor Alicia A. Potter

Alicia A. Potter 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).

  • Profen resolution
    Patent number: 5302751
    Abstract: A process is disclosed that is useful for separating the enantiomers of a racemic mixture of an aliphatic carboxylic acid having the formula ##STR1## where R.sub.1 is hydrogen or alkyl, R.sub.2, R.sub.3 and R.sub.4 are independently different and are hydrogen, alkyl, cycloalkyl, alkenyl, alkynyl, phenyl, substituted phenyl, naphthyl, substituted naphthyl, heteroaryl, substituted heteroaryl, haloalkyl, alkoxyalkyl, alkylthioalkyl, phenylalkyl, substituted phenylalkyl, heteroalkylalkyl, substituted heteroalkylalkyl or cycloalkylalkyl.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: April 12, 1994
    Assignee: Ethyl Corporation
    Inventors: Thanikavelu Manimaran, Alicia A. Potter
  • Resolution of ketoprofen
    Patent number: 5162576
    Abstract: A method for resolving (.+-.)-(.alpha.)-(3-benzoylphenyl) propionic acid is disclosed. The method comprises:i) converting said propionic acid with (-)-cinchonidine in a solvent comprising a mixture of an aliphatic ester and an alkyl alcohol;ii) separating teh diastereomeric salt from such conversion;iii) purifying said separated diastereomeric salt by a single recrystallization; andiv) isolating highly pure (+)-.alpha.-(3-benzoylphenyl) propionic acid without any further recrystallization.
    Type: Grant
    Filed: April 15, 1991
    Date of Patent: November 10, 1992
    Assignee: Ethyl Corporation
    Inventors: Thanikavelu Manimaran, Alicia A. Potter