Patents by Inventor Walter Gerlach

Walter Gerlach 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 for recovering gold from refractory ore
    Patent number: 9920395
    Abstract: A method of recovering gold from refractory ore containing a carbonaceous material, a sulfide and gold is provided. Gypsum seed crystals are added to a slurry containing a roasted refractory ore or a pressure-oxidized refractory ore to decrease gypsum encapsulation of gold and improve gold recovery.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: March 20, 2018
    Assignee: Ecolab USA Inc.
    Inventors: Ronald V. Davis, Daniel E. Child, Walter Gerlach
  • Freeze conditioning agents utilizing crude glycerin and flowback and produced water
    Patent number: 9683153
    Abstract: The invention provides methods and compositions for freeze conditioning particulating materials. The invention includes the use of the combination of crude glycerin with flowback or produced water. This combination prevents unwanted agglomeration when frozen. This combination also is non-corrosive and best of all facilitates the safe clean recycling of what would otherwise be unwanted dangerous waste material.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: June 20, 2017
    Assignee: Ecolab USA Inc.
    Inventors: Ronald V. Davis, Jing Wang, Stephen J. Blubaugh, Walter Gerlach
  • FREEZE CONDITIONING AGENTS UTILIZING CRUDE GLYCERIN AND FLOWBACK AND PRODUCED WATER
    Publication number: 20160289522
    Abstract: The invention provides methods and compositions for freeze conditioning particulating materials. The invention includes the use of the combination of crude glycerin with flowback or produced water. This combination prevents unwanted agglomeration when frozen. This combination also is non-corrosive and best of all facilitates the safe clean recycling of what would otherwise be unwanted dangerous waste material.
    Type: Application
    Filed: March 30, 2015
    Publication date: October 6, 2016
    Applicant: ECOLAB USA INC.
    Inventors: Ronald V. Davis, Jing Wang, Stephen J. Blubaugh, Walter Gerlach
  • METHOD FOR RECOVERING GOLD FROM REFRACTORY ORE
    Publication number: 20160083816
    Abstract: A method of recovering gold from refractory ore containing a carbonaceous material, a sulfide and gold is provided. Gypsum seed crystals are added to a slurry containing a roasted refractory ore or a pressure-oxidized refractory ore to decrease gypsum encapsulation of gold and improve gold recovery.
    Type: Application
    Filed: September 16, 2015
    Publication date: March 24, 2016
    Inventors: Ronald V. Davis, Daniel E. Child, Walter Gerlach
  • Process for sintering iron oxide-containing materials on a sintering machine
    Patent number: 5476533
    Abstract: A sinterable mixture comprising iron-containing materials and solid fuel is sintered on a sintering machine; to decrease the rate at which exhaust gas is to be removed and to produce a desirable sinter, a part of the exhaust gas is enriched to an oxygen content of up to 24% by the addition of higher-oxygen gases and is then recirculated as a recycle gas, and exhaust gas is removed as a tail gas from the process only at a rate which corresponds to the rate of the gas which is formed during the sintering process plus the rate of the gas added for enriching plus the rate of inleaked air which has infiltrated from the outside minus the rate of oxygen consumption.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: December 19, 1995
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Fred Stieler, Norbert Magedanz, Walter Gerlach, Jurgen Otto, Martin Hirsch, Fred Cappel, Detlev Schlebusch, Hermann Schmidt, Heiko Weisel, Hans-Joachim Werz