Patents by Inventor Erhard Klotzer

Erhard Klotzer 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).

  • Vulcanizable rubber mixture for tire treads having improved skid resistance
    Patent number: 3938574
    Abstract: A vulcanizable rubber mixture for tire treads containing a rubber, preferably vulcanizable with sulfur, silica filler, plasticizer oil, a sulfur containing organosilane, sulfur and an accelerator comprising one or two polybutadiene rubbers in an amount of 20 to 100 weight % of the total elastomer, one or two rubbers other than a polybutadiene of the group consisting of synthetic rubber and natural rubber in an amount of 80 to 0 weight % of the total elastomer, plasticizer oil in an amount of 40 to 100 parts by weight per 100 parts by weight of rubber, at least one bis-[alkoxysilylalkyl]-oligosulfide in an amount of 0.1 to 25 parts by weight per 100 parts by weight of rubber, sulfur and/or sulfur donors in an amount of about 0.2 to 8 parts by weight per 100 parts by weight of rubber, and at least one vulcanization accelerator in an amount of about 0.
    Type: Grant
    Filed: November 21, 1974
    Date of Patent: February 17, 1976
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Kurt Burmester, Siegfried Wolff, Erhard Klotzer, Friedrich Thurn