Patents by Inventor Erwin Walter

Erwin Walter 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).

  • Activated carbon and process for its production
    Patent number: 4642304
    Abstract: Activated carbon is produced from lignite coke. It is characterized by the product of the molasses number times the iodine number divided by 1000 being 350 to 1000 and/or the product of the molasses number times the methylene blue number divided by 10 being 500 to 1200. It is produced by adding aqueous alkali or alkaline earth carbonate solution and/or aqueous alkali or alkaline earth hydroxide solution by means of lance during the steam activation of lignite coke in a rotating tube.
    Type: Grant
    Filed: March 28, 1986
    Date of Patent: February 10, 1987
    Assignee: Degussa Aktiengesellschaft
    Inventors: Alfons Karl, Erwin Walter, Peter Kleinschmit, Hermann Gottschlich, Roland Kutz, Detley Koth
  • Process for production of activated carbon from lignite coke
    Patent number: 4603119
    Abstract: Activated carbon is produced from lignite coke. It is characterized by the product of the molasses number times the iodine number divided by 1000 being 350 to 1000 and/or the product of the molasses number times the methylene blue number divided by 10 being 500 to 1200. It is produced by adding aqueous alkali or alkaline earth carbonate solution and/or aqueous alkali or alkaline earth hydroxide solution by means of lance during the steam activation of lignite coke in a rotating tube.
    Type: Grant
    Filed: May 9, 1985
    Date of Patent: July 29, 1986
    Inventors: Alfons Karl, Erwin Walter, Peter Kleinschmit, Hermann Gottschlich, Roland Kutz, Detlev Koth
  • Process for the production of carbon black containing pigment-synthetic resin concentrates
    Patent number: 4379871
    Abstract: There is disclosed a process for the production of a pigment-synthetic resin concentrate containing an organic solvent soluble polymer and carbon black having quicker distributability in organic media such as lacquer binding media, printing inks, etc., such concentrates being especially suitable for the production of molded parts, castings, films and/or synthetic fibers, the process comprising continuously homogenizing in a mixer powdery pigment and powdery synthetic resin jointly with an organic solvent in a given case also containing plasticizer, stabilizer and/or dispersing acid, dispersing the pigment in the mixture, removing the solvent from the dispersion, comminuting the resulting pigment-synthetic resin concentrated and grinding the product.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: April 12, 1983
    Assignee: Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler
    Inventors: Peter Werle, Hans Graf, Erwin Walter
  • Spinning top bowling game
    Patent number: 4007935
    Abstract: A bowling-like game played with pins and a spinning top on an inclined board surface. An array of spots is marked adjacent one end of the board and a starting area is marked at the other end of the board. The spots are coded to indicate a variety of different pin arrangement and provide for a variety of different scoring techniques. Thus, the spots as well as the pin fall may contribute to the scoring. The tip of the top is specially shaped to enable a player to direct the top in any one of several courses.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: February 15, 1977
    Inventor: Erwin-Walter C. Siber