Patents by Inventor Bernd Alker

Bernd Alker 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).

  • Carboxamido (meth) acrylic acid esters for treatment of collagen
    Patent number: 5300537
    Abstract: For bonding dental fillings to dentine, carboxamide group-containing (meth)acrylic acid ester of the formula ##STR1## in which R.sup.1 denotes hydrogen or methyl,R.sup.2 denotes alkyl (C.sub.1 -C.sub.4) or alkenyl (C.sub.2 -C.sub.4), optionally substituted by hydroxyl, carboxyl, halogen or amino of the formula ##STR2## in which R.sup.4 and R.sup.5 are identical or different and denote hydrogen or lower alkyl,R.sup.3 denotes hydrogen or has one of the abovementioned meanings of R.sup.2 andX is a divalent aliphatic (C.sub.1 -C.sub.6) or cycloaliphatic radical (C.sub.3 -C.sub.6), which can optionally contain one or more oxygen, sulphur and/or --NR.sup.4 -bridges,whereR.sup.4 has the abovementioned meaning.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: April 5, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Muller, Wolfgang Podszun, Bernd Alker
  • Process for bonding a material to a collagen-containing material
    Patent number: 5277739
    Abstract: Adhesive component formulations containing (meth)acrylic acid esters, containing formamide groups, and optionally an initiator, which are used as an adhesive component for the treatment of collagen-containing materials.
    Type: Grant
    Filed: December 15, 1992
    Date of Patent: January 11, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Muller, Wolfgang Podszun, Bernd Alker