Patents by Inventor Hannes von Harpe

Hannes von Harpe 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).

  • Filter candle and filter stocking
    Patent number: 5076917
    Abstract: The specification relates to a filter candle for filtering highly-viscous fluids, e.g. polymer melts, and in a number of parts which can be dismantled and comprising a filter stocking permanently connected to a cap, the two parts being replaceable together. Owing to the complete absence of screwed components, the filter candle can be made very small. It is also easier to take apart and clean when clogged by solidified residues of melt. Individual parts can easily be replaced when unserviceable. The complete filter candle has a plug connection to a baseplate, from which it can rapidly be separated.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: December 31, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Theo Luhrmann, Wilfried Hocks, Hannes von Harpe
  • Mixtures of polyurethanes and unsaturated polyester resins
    Patent number: 4413072
    Abstract: Unsaturated polyester resins containing--as additive--polyesterurethanes having free carboxyl groups and/or terminal radically polymerizable double bonds are good starting materials for manufacturing moulded articles with outstanding properties, particularly with an excellent impact strength.
    Type: Grant
    Filed: June 9, 1981
    Date of Patent: November 1, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernhard Hess, Hansjochen Schulz-Walz, Hannes von Harpe, Bernd Peltzer, Ludwig Bottenbruch
  • Molding composition based on unsaturated polyesters
    Patent number: 4237244
    Abstract: Molding compositions comprising terminally unsaturated polyesters, vinyl or vinylidene compounds copolymerizable therewith and elastomeric polymers have an excellent impact strength and a good heat distortion temperature, strength and rigidity.
    Type: Grant
    Filed: January 3, 1979
    Date of Patent: December 2, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hannes von Harpe, Ludwig Bottenbruch, Bernd Peltzer, Hansjochen Schulz-Walz
  • Copolymerizable molding compositions based on unsaturated polyurethanes
    Patent number: 4223099
    Abstract: Molding compositions comprising a "terminally unsaturated"polyurethane, a copolymerizable vinyl or vinylidene compound and a rubbery-elastic polymer having a glass transition temperature of between -90.degree. and +10.degree. C. can be used for the preparation of molded articles having a considerably increased impact strength and a good heat distortion temperature, strength and rigidity.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: September 16, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hannes von Harpe, Ludwig Bottenbruch, Bernd Peltzer, Leo Morbitzer, Helmut Korber, Hansjochen Schulz-Walz