Patents by Inventor Henry Dolezal

Henry Dolezal 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).

  • Recovery of arsenic from flue dust
    Patent number: 4401632
    Abstract: Arsenic is recovered from flue dusts by forming an aqueous slurry of the dust, treating the slurry with SO.sub.2 gas to solubilize arsenic, and precipitating the arsenic as As.sub.2 O.sub.3 by means of sulfuric acid.
    Type: Grant
    Filed: February 11, 1982
    Date of Patent: August 30, 1983
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Brent W. Madsen, Henry Dolezal, Philip A. Bloom, Monte B. Shirts
  • Preparation of hydrosulfides
    Patent number: 4156656
    Abstract: Hydrosulfides of sodium, potassium, calcium, barium and strontium are prepared by reaction of the oxide or hydroxide of the metal with sulfur in aqueous medium at elevated temperature and pressure.
    Type: Grant
    Filed: June 13, 1978
    Date of Patent: May 29, 1979
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Raymond O. Dannenberg, Henry Dolezal
  • Dehydration of magnesium chloride
    Patent number: 3962408
    Abstract: A method for dehydrating magnesium chloride hydrates or brines by complexing with amine hydrochlorides is described. Magnesium chloride hydrate or brine is reacted with an amine hydrochloride to form a complex which is then heated to first drive off water and then at a more elevated temperature to decompose the anhydrous complex into anhydrous magnesium chloride and amine hydrochloride. Any magnesium oxides present in the starting material is converted to the chloride by reaction with the HCl present.
    Type: Grant
    Filed: July 14, 1975
    Date of Patent: June 8, 1976
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventor: Henry Dolezal