Patents by Inventor Gerhard Dötter

Gerhard Dötter 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).

  • Compositions suitable for electrochemical cells
    Patent number: 6991874
    Abstract: The compositions comprise: (a) from 1 to 99% by weight of a pigment (I) having a primary particle size of from 5 nm to 100 ?m which is a solid Ia or a compound Ib which acts as cathode material in electrochemical cells or a compound Ic which acts as anode material in electrochemical cells or a mixture of the solid Ia with the compound Ib or the compound Ic, (b) from 1 to 99% by weight of a polymeric material (II) which comprises: (IIa) from 1 to 100% by weight of a polymer or copolymer (IIa) which has, as part of the chain, at the end(s) of the chain and/or laterally on the chain, reactive groups (RG) which are capable of crosslinking reactions under the action of heat and/or UV radiation, and (IIb) from 0 to 99% by weight of at least one polymer or copolymer (IIb) which is free of reactive groups RG.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: January 31, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Möhwald, Gerhard Dötter, Rainer Blum, Peter Keller, Stephan Bauer, Bernd Bronstert
  • Composites bodies used as separators in electrochemical cells
    Patent number: 6632561
    Abstract: A composite comprises at least one layer which includes a composite comprising (a) from 1 to 99% by weight of a solid (I) with a primary particle size of from 5 nm to 100 &mgr;m or a mixture made from at least two solids, (b) from 99 to 1% by weight of a polymeric binder (II) which includes: (IIa) from 1 to 100% by weight of a polymer or copolymer (IIa) which has, along the chain, terminally and/or laterally, reactive groups (RG) which are capable of crosslinking reactions when exposed to heat and/or UV radiation, and (IIb) from 0 to 99% by weight of at least one polymer or copolymer (IIb) which is free from reactive groups RG, where the at least one layer has been applied to at least one second layer comprising at least one conventional separator.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: October 14, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Stephan Bauer, Bernd Bronstert, Helmut Möhwald, Rainer Blum, Gerhard Dötter
  • Compositions suitable for electrochemical cells
    Patent number: 6475663
    Abstract: A composition comprising: (a) from 0 to less than 1% by weight of a pigment (I) having a primary particle size of from 5 nm to 100 &mgr;m which is a solid Ia or a compound Ib which acts as cathode material in electrochemical cells or a compound Ic which acts as anode material in electrochemical cells or a mixture of the solid Ia with the compound Ib or the compound Ic, (b) more than 99 to 100% by weight of a polymeric material (II) which comprises: (IIa)from 1 to 100% by weight of a polymer or copolymer (IIa) containing reactive groups (RG) on the chain in terminal and/or lateral positions which are capable of crosslinking reactions in the presence of heat and/or with UV radiation, and (IIb) from 0 to 99% by weight of at least one polymer or copolymer (IIb) which contains no reactive groups (RG).
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: November 5, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Möhwald, Gerhard Dötter, Rainer Blum, Peter Keller, Stephan Bauer, Bernd Bronstert