Patents by Inventor Manfred Spies

Manfred Spies 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).

  • Self-adhesive tape which can be partially detackified by radiation (dicing tape)
    Patent number: 5525422
    Abstract: Radiation-crosslinkable self-adhesive tape (dicing tape) for the temporary fixing of wafers, having a support comprising a radiation-transparent film and a radiation-crosslinkable self-adhesive composition, characterized in that the polymeric self-adhesive composition contains copolymerized radiation initiators.
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: June 11, 1996
    Assignee: Beiersdorf Aktiengesellschaft
    Inventors: Manfred Spies, Christian Harder, Gunter Guse, Claudia Feldt, Robert Meyer
  • Process for the production of SiO.sub.2 containing polybenzamides
    Patent number: 5006636
    Abstract: The invention relates to a process for the production of poly-(1,4-benzamide) in admixture with SiO.sub.2 by polycondensation of 4-aminobenzoic acid in the presence of SiCl.sub.4 in 1,3-dimethyltetrahydro-2(1H)-pyrimidinone in the presence of salts, such as lithium chloride or calcium chloride.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: April 9, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Spies, Walter Heitz
  • Process for the production of polybenzamide with halide catalyst
    Patent number: 4696999
    Abstract: The invention relates to a process for the production of polybenzamides from amino benzoic acids in the presence of metal halides.
    Type: Grant
    Filed: February 14, 1986
    Date of Patent: September 29, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Spies, Peter Strohriegl, Walter Heitz