Patents by Inventor Erwin Schmeir

Erwin Schmeir 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).

  • Production of purified iron chloride by a vacuum process in the manufacture of titanium dioxide
    Patent number: 5248497
    Abstract: This invention provides a process for the recovery of purified ferrous chloride resulting as a by-product during the production of titanium dioxide by the chloride process. The process involves a two-step cooling of a filtered solution containing ferrous chloride and other material in a manner to crystallize the ferrous chloride as a pure product. Such product can then be sold commercially including to companies involved in the waste water treatment business.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: September 28, 1993
    Assignee: Kronos, Inc.
    Inventors: Achim Hartmann, Erwin Schmeir