Patents by Inventor Sigmund Breister

Sigmund Breister 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 and composition for providing reduced discoloration caused by the presence of pyrithione and ferric ion in water-based paints and paint bases
    Patent number: 4957658
    Abstract: This invention relates generally to paints and paint bases and, more specifically, to a process and composition for providing reduced discoloration of paints and paint bases containing a pyrithione and ferric ion.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: September 18, 1990
    Assignee: Olin Corporation
    Inventors: Cheryl B. French, Sigmund Breister
  • Process and composition for providing reduced discoloration caused by the presence of pyrithione and ferric ion in water-based paints and paint bases
    Patent number: 4935061
    Abstract: This invention relates generally to paints and paint bases and, more specifically, to a process and composition for providing reduced discoloration of paints and paint bases containing a pyrithione and ferric ion.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: June 19, 1990
    Assignee: Olin Corporation
    Inventors: Cheryl B. French, Sigmund Breister
  • Use of the sodium salt of 2-mercaptopyridine-N-oxide to separate gold from acidic solutions
    Patent number: 4368073
    Abstract: Disclosed is a process for separating gold from acidic solutions having a pH below about 3 which comprises the steps of:(a) adding a sufficient amount of the sodium salt of 2-mercaptopyridine-N-oxide to cause at least a portion of the gold in the aqueous acidic solution precipitate from the solution; and(b) separating the precipitated gold from the acidic solution.Also disclosed is that gold is selectively precipitated from acidic solutions containing other metals [e.g., Fe, Cu, Zn, Sn] when the molar ratio of added sodium 2-mercaptopyridine-N-oxide to gold in the acidic solution is less than about 1.5:1.
    Type: Grant
    Filed: April 30, 1981
    Date of Patent: January 11, 1983
    Assignee: Olin Corporation
    Inventors: Sigmund Breister, Joseph R. Reiner
  • Use of heavy metal chelates of 2-mercaptopyridine-N-oxide to separate selected precious metals from acidic solutions
    Patent number: 4269621
    Abstract: Disclosed is a process for separating precious metals such as gold or platinum from acidic solutions having a pH below about 3, which comprises the steps of:(a) adding a sufficient amount of a heavy metal chelate (e.g., zinc or iron) of 2-mercaptopyridine-N-oxide to the acidic solution to cause at least a portion of the precious metals in the solution to transchelate with the heavy metal chelate of 2-mercaptopyridine-N-oxide and then to form precipitates in the solution; and(b) separating the precipitated precious metal chelates of 2-mercaptopyridine from the acidic solution.
    Type: Grant
    Filed: January 24, 1980
    Date of Patent: May 26, 1981
    Assignee: Olin Corporation
    Inventors: Joseph R. Reiner, Sigmund Breister