Patents by Inventor Friedrich Hertl

Friedrich Hertl 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).

  • Patent number: 4059558
    Abstract: Silica and silicates having a water content of less than 0.5% by weight and specific surface areas of 25 to 300 (.+-. 25) m.sup.2 /g. by the BET procedure are employed as light fillers for the vulcanization of natural rubber and synthetic elastomers with or without counter pressure.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: November 22, 1977
    Assignee: Deutsche Gold- und Silber-Scheldeanstalt Vormals Roessler
    Inventors: Paul Golombeck, Friedrich Hertl