Patents by Inventor Ronald R. Eva

Ronald R. Eva 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).

  • Skraup reaction process for synthesizing quinolones
    Patent number: 6103904
    Abstract: The present invention relates to an improved Skraup reaction process wherein pressure is applied during the reaction and the number of equivalents of sulfuric acid utilized is reduced.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: August 15, 2000
    Assignee: BASF Corporation
    Inventor: Ronald R. Eva
  • Method for isolating 3-[2-chloro-4-(trifluoromethyl)-phenoxy]-benzoic acid
    Patent number: 6066761
    Abstract: A process for the isolation of 3-[2-chloro-4-(trifluoromethyl)phenoxy]benzoic acid of the formula I ##STR1## from an aqueous solution of its metal salt comprises a) reacting the metal salt of 3-[2-chloro-4-(trifluoromethyl)phenoxy]benzoic acid with an organic or inorganic acid;b) heating the reaction mixture until a liquid two-phase system of organic and aqueous phase has formed; andc) separating the organic phase from the aqueous phase.
    Type: Grant
    Filed: July 28, 1999
    Date of Patent: May 23, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Rupert Merkle, Ronald R. Eva, Dirk Franke, Simon A. Jones, Wolfgang Mattmann, Manfred Munzinger