Patents by Inventor Helmut Gruner

Helmut Gruner 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).

  • Method for the production of (meth)acrylic acid esters
    Publication number: 20070129564
    Abstract: Process for preparing (meth)acrylic esters, in which chromanol derivatives are used as stabilizers against polymerization, and the use of the thus obtainable (meth)acrylic esters.
    Type: Application
    Filed: February 16, 2005
    Publication date: June 7, 2007
    Applicant: BASF Aktiengesellschaft
    Inventors: Reinhold Schwalm, Barbel Meyer, Helmut Gruner, Thomas Daniel, Ulrich Riegel, Dieter Hermeling
  • Preparation of esters of low residual acid content from .alpha., .beta.-ethylenically unsaturated carboxylic acids and hydroxyl-containing polymers
    Patent number: 6063957
    Abstract: A process for preparing esters E of low residual acid content from .alpha.,.beta.-monoethylenically unsaturated C.sub.3 -C.sub.6 mono- and dicarboxylic acids S and hydroxyl-containing polycondensates P, wherea) the acid S and the polycondensate P or the monomeric and/or oligomeric and/or polymeric components which form the polycondensate P, are reacted in the presence or absence of a solvent and/or of an esterification catalyst and/or of further additives, with removal of the water which forms, andb) the unreacted acid S is removed by distillation,comprises adding water for the distillative removal of the acid S in step b).
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: May 16, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Rainer Koniger, Wolfgang Reich, Erich Beck, Helmut Gruner
  • Preparation of cyclic acetals or ketals
    Patent number: 5917059
    Abstract: Cyclic acetals or ketals are prepared by reacting a polyol with the appropriate aldehydes or ketones, with part of the aldehyde or ketone being distilled out during the reaction.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: June 29, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernd Bruchmann, Karl Haberle, Helmut Gruner, Michael Hirn