Patents by Inventor Pieter G. Weber

Pieter G. Weber 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).

  • Diamine salts of clavulanic acid
    Patent number: 5719277
    Abstract: New diamine mono and diamine di salts of clavulanic acid, pharmaceutical compositions comprising the same, and a new process using these diamine salts in the preparation of clavulanic acid and salts and esters thereof have been provided.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: February 17, 1998
    Assignee: Gist-Brocades N.V.
    Inventor: Pieter G. Weber
  • Selective N-acylation of amino alcohols
    Patent number: 5631356
    Abstract: The present invention provides an efficient method for the production of N-acyl amino alcohols via the selective acylation of the free amines of amino alcohols by reacting with an organic acid or a salt thereof with an alkyl sulfonyl chloride or an alkyl phenyl sulfonyl chloride, in an organic solvent and in the presence of an organic base, to form the corresponding mixed anhydride, followed by reacting the mixed anhydride with an amino alcohol or a salt thereof to form the corresponding N-acyl amino alcohol.
    Type: Grant
    Filed: December 1, 1994
    Date of Patent: May 20, 1997
    Assignee: Gist-brocades, N.V.
    Inventors: Jan W. H. Smeets, Pieter G. Weber
  • 14.alpha.,17.alpha.-dihydroxy-17.beta.-substituted steroids
    Patent number: 5093502
    Abstract: A process for the preparation of novel 14.alpha., 17.alpha.-dihydroxy-17.beta.-substituted steroids by reacting 14.alpha.-hydroxy-17-oxo-steroids with metal organic compounds and the use of the said novel steroids in the production of 14.alpha., 17.alpha.-methylenedioxy-pregnane derivatives.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: March 3, 1992
    Assignee: Akzo N.V.
    Inventors: Peter M. Smid, Willem J. Van Zoest, Pieter G. Weber, Arthur F. Marx