Patents by Inventor Norris J. Landis

Norris J. Landis 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).

  • Urea hydrolysis
    Patent number: 4341640
    Abstract: The process for the purification of urea containing waste streams is improved by conducting the purification in a vessel having at least one treating zone wherein the urea containing waste stream is both hydrolyzed and stripped of the products of the urea hydrolysis and other impurities found in the waste stream.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: July 27, 1982
    Assignee: Standard Oil Company
    Inventor: Norris J. Landis
  • Acrylonitrile purification by extractive distillation
    Patent number: 4269667
    Abstract: A method for purifying acrylonitrile resulting in capital and operating cost savings consists of distilling a solution of acrylonitrile and impurities in a distillation column under vacuum, and removing the purified acrylonitrile as a vaporous sidestream from the column.
    Type: Grant
    Filed: August 2, 1979
    Date of Patent: May 26, 1981
    Assignee: Standard Oil Company
    Inventor: Norris J. Landis
  • Process for prilling urea
    Patent number: 4190622
    Abstract: Urea prills are obtained by contacting molten urea droplets with a co-current gas stream in a prill tower and cooling and collecting the prills thus formed in a fluidized bed having a second gas stream flowing countercurrent to the prills.
    Type: Grant
    Filed: May 4, 1978
    Date of Patent: February 26, 1980
    Assignee: Standard Oil Company (Ohio)
    Inventor: Norris J. Landis