Patents by Inventor Bernd Neffgen

Bernd Neffgen 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: 5314971
    Abstract: Urethane-modified polyoxyalkylene epoxy resins useful in aqueous dispersions having the general formula ##STR1## where R and R.sup.1 are, independently of one another, ##STR2## wherein R.sup.3 is a C.sub.1-3 alkyl group,R.sup.4 is a C.sub.1-4 alkylenemoiety, ##STR3## each b is, independently of one another, an integer from 0 to 4, and c is 1 to 10;a is 1 to 20, andR.sub.2 is H and at least once the group ##STR4## R.sup.6 is a C.sub.1-5 alkyl group, R.sup.7 is H or CH.sub.3 --,d is 1 to 100,e is 0 or 1,f is 0 or 1, andR.sup.8 is an aliphatic, cyclic, alicyclic, aromatic or araliphatic hydrocarbon group.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: May 24, 1994
    Assignee: Witco GmbH
    Inventors: Bernd Neffgen, Wolfgang Scherzer
  • Patent number: 5274012
    Abstract: The invention relates to modified polyoxyalkylene epoxy resins based on polyhydric phenols prepared by the addition of polyethers and/or polyether monourethanes containing isocyanate groups to higher-molecular-weight hydroxyl group-containing polyglycidyl compounds, and to the use of these reaction products in the preparation of stable aqueous dispersions.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: December 28, 1993
    Assignee: Witco GmbH
    Inventors: Bernd Neffgen, Wolfgang Scherzer
  • Patent number: 4435558
    Abstract: The method of hardening a glycidyl compound with a polyether urethane urea amino hardener is disclosed, said hardener being prepared by reacting (1) a blocked prepolymer prepared by reacting a phenolic compound with the reaction product of a polyether polyol with an excess of polyisocyanate, with (2) a polyfunctional amino compound.
    Type: Grant
    Filed: December 15, 1982
    Date of Patent: March 6, 1984
    Assignee: Schering AG
    Inventors: Christian Burba, Hermann-Josef Lucas, Bernd Neffgen
  • Patent number: 3993708
    Abstract: Elastic hardened epoxy resin polymers prepared by the reaction of a liquid polyepoxy resin with the amino-terminated hydrolysis products of enamine- or ketimine-terminated adducts formed by reacting a polyalkylene ether glycol with a polyisocyanate to form a polyether urethane and then reacting the polyether urethane with an enamine or ketimine having an hydroxy group.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: November 23, 1976
    Assignee: Schering Aktiengesellschaft
    Inventors: Bernd Brinkmann, Bernd Neffgen