Patents by Inventor Werner Sroka

Werner Sroka 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).

  • Process for the production of high quality carbon black
    Patent number: 4282198
    Abstract: High quality carbon black forming material convertible with high yield into furnace black having a high abrasion resistance in rubber is prepared by dissolving pitch with conventional thinly liquid carbon black feed stock and mechanically separating suspended matter from the mixture obtained.
    Type: Grant
    Filed: January 4, 1980
    Date of Patent: August 4, 1981
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Lothar Rothbuhr, Werner Sroka, Walter Fritz
  • Process for the control of the ratio DBP number/DBP number after pressing in the manufacture of carbon black pellets
    Patent number: 4238199
    Abstract: A process for controlling the ratio:DBP NUMBER/DBP NUMBER AFTER PRESSINGfor carbon black pellets comprising mixing the carbon black with water and forming the carbon black and water mixture into pellets by means of a wet pelletizing machine, selectively controlling the rotating shaft speed of the pelletizing machine and the amount of water and the location of water injected into the pelletizing machine; and subsequently drying the wet carbon black.
    Type: Grant
    Filed: July 30, 1979
    Date of Patent: December 9, 1980
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Lothar Rothbuhr, Werner Sroka, Karl Vogel
  • Process for the production of high quality carbon black forming material
    Patent number: 4225416
    Abstract: High quality carbon black forming material convertible with high yield into furnace black having a high abrasion resistance in rubber is prepared by dissolving pitch with conventional thinly liquid carbon black feed stock and mechanically separating suspended matter from the mixture obtained.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: September 30, 1980
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Lothar Rothbuhr, Werner Sroka, Walter Fritz
  • Process for the production of high qualtiy carbon black
    Patent number: 4154808
    Abstract: High quality carbon black forming material convertible with high yield into furnace black having a high abrasion resistance in rubber is prepared by dissolving pitch with conventional thinly liquid carbon black feed stock and mechanically separating suspended matter from the mixture obtained.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: May 15, 1979
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Lothar Rothbuhr, Werner Sroka, Walter Fritz