Patents by Inventor Alan C. Crosby

Alan C. Crosby 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).

  • Process for reducing the hydrogen sulfide content in geothermal steam
    Patent number: 4374106
    Abstract: A process for removing hydrogen sulfide from geothermal steam utilizes iron oxide supported by a carrier resistant to deterioration by the geothermal steam. The process includes the addition of an oxygen-containing gas to the geothermal steam before contacting the steam with the iron oxide at a temperature of at least about 300.degree. F. The amount of oxygen added to the geothermal steam is sufficient to make the molar ratio of oxygen-to-hydrogen sulfide in the steam to be at least about 10.
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: February 15, 1983
    Assignee: Occidental Research Corporation
    Inventors: Ann B. Tipton, Alan C. Crosby
  • Dewatering of solid residues of carbonaceous materials
    Patent number: 4323365
    Abstract: Process for removal of water from a mixture of water and certain solid residues of carbonaceous material, such as a coal char-water slurry, which comprises mixing the slurry with an acid, preferably hydrochloric acid, a surfactant, preferably water-immiscible such as lecithin, and an organic compound such as a liquid hydrocarbon, e.g. mineral spirits, causing the char to agglomerate, and thereby facilitating separation of the char from the mixture, as by screening, and filtering or centrifuging.
    Type: Grant
    Filed: July 28, 1980
    Date of Patent: April 6, 1982
    Assignee: Occidental Research Corporation
    Inventors: Alan C. Crosby, David C. Campen