Patents by Inventor Bahram Dormichian

Bahram Dormichian 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).

  • Method of purifying by-product gypsum
    Patent number: 4612173
    Abstract: Disclosed is a method of purifying by-product gypsum by making it into a sludge and washing the sludge in a single, multi-stage filtering washer. The washing liquid is recovered from the filtrate from the first stage of the washer and subject to neutralization in a two-stage neutralizing unit. The sludges separated in the neutralizing unit are dried and the excessive washing liquid from the second stage of the neutralizing unit is further processed in an evaporation stage.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: September 16, 1986
    Assignee: Krupp Koppers GmbH
    Inventors: Hans-Werner Gosch, Karl Franke, Jorg Kohlbecker, Bahram Dormichian