Patents by Inventor Marjorie M. Hatter

Marjorie M. Hatter 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).

  • Tetrathiocarbonate continuous process
    Patent number: 5993771
    Abstract: Salts of tetrathiocarbonic acid are produced by a process in which a hydroxide, sulfur, carbon disulfide and hydrogen sulfide are reacted continuously. The salts are produced as aqueous solutions having concentrations of about 15 to about 55 percent by weight.
    Type: Grant
    Filed: February 25, 1992
    Date of Patent: November 30, 1999
    Assignee: Entek Corporation
    Inventors: Marjorie M. Hatter, Charles F. Wong
  • Tetrathiocarbonate batch process
    Patent number: 5397557
    Abstract: Salts of tetrathiocarbonic acid are produced by a batch process in which a hydroxide, hydrogen sulfide, sulfur and carbon disulfide are reacted sequentially. The salts are produced as aqueous solutions having concentrations of upwards of 30 percent by weight.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: March 14, 1995
    Assignee: Union Oil Company of California
    Inventors: Marjorie M. Hatter, Charles F. Wong
  • Method for gas capping of idle geothermal steam wells
    Patent number: 4407366
    Abstract: A method for capping an idle geothermal steam well so as to prevent hydrogen sulfide emissions and well damage due to steam condensation includes replacing geothermal steam in a well borehole with gas, perferably an inert gas such as nitrogen, and sealing the well at the wellhead. Thereafter additional quantities of the gas are bled into the well borehole at a rate that substantially prevents steam condensation in the borehole. The method includes purging the well bore with air sufficiently to assure all steam is swept out of the well before the gas is introduced.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: October 4, 1983
    Assignee: Union Oil Company of California
    Inventors: William C. Lieffers, Marjorie M. Hatter