Patents by Inventor Charles G. Eckhart

Charles G. Eckhart 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).

  • Patent number: 6623760
    Abstract: Methods of preparing particulates for agglomeration, having a specified particle size distribution and desired convertible amorphous content, are described. The method involves a plurality of micronizing steps at least two of which are separated by a curing step. In the curing step, a stimulus such as humidity may be used to crystallize at least some, and in many instances preferably all, of the convertible amorphous content.
    Type: Grant
    Filed: January 26, 2000
    Date of Patent: September 23, 2003
    Assignee: Schering Corporation
    Inventors: Tsong-Toh Yang, Stephen K. C. Yu, Charles G. Eckhart, Michael B. Mitchell
  • Patent number: 6506767
    Abstract: Crystalline polymorphs of 8-chloro-6,11-dihydro-11-(4-piperidylidene)-5H-benzo[5,6]cycloheptic[1,2-b]pyridine represented by the formula pharmaceutical compositions containing such polymorphs, and methods of using such polymorphs to treat allergic reactions in mammals such as man are disclosed.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: January 14, 2003
    Assignee: Schering Corporation
    Inventors: Doris P. Schumacher, Junning Lee, Lawrence R. Rogers, Charles G. Eckhart, Naneshwar S. Sawant, Michael B. Mitchell
  • Patent number: 4634556
    Abstract: A novel, stable, crystalline sodium (5R,6S,8R)-6-(1-hydroxyethyl)-2-(2-carbamoyloxyethylthio)-penem-3-carboxyl ate (designated as Form II) is prepared by forming a homogenous solution of sodium (5R,6S,8R)-6-(1-hydroxyethyl)-2-(2-carbamoyloxyethylthio)-penem-3-carboxyl ate combined with stirring the homogenous solution for a time and at a temperature sufficient to produce Form II and recovering Form II. Form II may also be prepared by contacting a first solution obtained by dissolving (5R,6S,8R)-6-(1-hydroxyethyl)-2-(2-carbamoyloxyethylthio)-penem-3-carboxyl ic acid in dimethylacetamide with a second solution obtained by dissolving a sodium salt of an organic acid having a pKa of up to about 5, e.g., sodium 2-ethylhexanoate in acetone, in the presence of at least 5 volume percent water while stirring the reaction mixture so formed at a temperature and for a time sufficient to produce Form II followed by recovering Form II.
    Type: Grant
    Filed: May 10, 1985
    Date of Patent: January 6, 1987
    Assignee: Schering Corporation
    Inventors: John K. Jenkins, John S. Chiu, Charles G. Eckhart, Paul E. McNamara, Stanley Rosenhouse, Richard E. Youngstrom