Patents by Inventor Alexa Sommer

Alexa Sommer 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).

  • Recording material for images or data
    Patent number: 5693451
    Abstract: The present invention relates to a single or multi-layer recording material for recording images or data, which material has at least one layer sensitive to light or to heat of a plastic containing a pyrrole compound or a pyrrole oligomer.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: December 2, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Alexa Sommer, Udo Herrmann, Robert Bloodworth, Gunther Penners, Klaus Sommer
  • Use of nucleus-brominated phthalic acid anhydride for stabilizing thermoplastic polycarbonates against the effect of gamma-rays
    Patent number: 5476893
    Abstract: The invention relates to the use of nucleus-brominated phthalic acid derivatives, optionally in combination with polyalkylene oxides corresponding to formula (V) ##STR1## in which R is H, C.sub.1-6 alkyl, tetrahydropyranyl or a silyl group,R' is H or C.sub.1-6 alkyl andx is an integer of 1 to 100,for stabilizing thermoplastic polycarbonates against the effect of .gamma.-rays.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: December 19, 1995
    Assignee: Bayer Corporation
    Inventors: Charles Lundy, Ulrich Grigo, Alexa Sommer, Klaus Horn, Klaus Sommer, Arno Becker
  • High molecular weight arylene sulphide polymer melt mixed with aromatic nitro compound
    Patent number: 5086128
    Abstract: This invention relates to new high molecular weight arylene sulphide polymers which optionally additionally display improved resistance to UV radiation and are prepared by melting arylene sulphide polymers, preferably PPS, with polynitro compounds or with mononitro compounds containing at least one other substituent capable of reacting with the arylene sulphide polymer.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: February 4, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Detlef Heinz, Burkhard Kohler, Rolf-Volker Meyer, Klaus Reinking, Alexa Sommer
  • Free-flowing polyarylene sulfides crystallizing with delay
    Patent number: 4996256
    Abstract: The invention relates to new, free-flowing arylene sulfide polymers (PAS) preferably phenylene sulfide polymers, which crystallize with delay, optionally additionally display improved resistance to UV radiation, and are prepared by mixing PAS with aromatic mononitro compounds in the melt, preferably with the application of shearing forces.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: February 26, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Detlef Heinz, Burkhard Kohler, Rolf-Volker Meyer, Klaus Reinking, Alexa Sommer