Patents by Inventor Sverker Wahlberg

Sverker Wahlberg 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 of preparing powders for hard materials from APT and soluble cobalt salts
    Patent number: 5658395
    Abstract: According to the present invention there is now provided a method for preparing a powder containing W and Co and/or Ni characterized in reacting APT and a soluble salt of Co (Ni) in water at temperatures from room temperature to the boiling point of the solution keeping the solution pH at a constant level during the chemical reactions. The powder is filtered off, dried and reduced to a metallic powder which may be further carburized to form a powder containing WC and Co and/or Ni.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: August 19, 1997
    Assignee: Sandvik AB
    Inventors: Sverker Wahlberg, Mamoun Muhammed, Ingmar Grenthe
  • Method of preparing powders for hard materials from cobalt salts and soluble tungstate salts
    Patent number: 5632824
    Abstract: There is disclosed a method for preparing a powder containing ammonium salts of W+Co(Ni) complex ions, through chemical reactions, in a water solution at temperatures from 70.degree. C. to the boiling point and at pH around neutral, between tungstate salts and cobalt (nickel) salts characterized in that said tungstate salts are the highly soluble sodium tungstate or ammonium metatungstate.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: May 27, 1997
    Assignee: Sandvik AB
    Inventors: Ingmar Grenthe, Mamoun Muhammed, Sverker Wahlberg
  • Method of preparing powders for hard materials
    Patent number: 5594929
    Abstract: According to the invention there is now provided a simple method of preparing a powder containing WC and cobalt and/or nickel. APT-powder and a powder of a basic salt of cobalt and/or cobalt are mixed in water or in mixed solvents. The suspension is stirred to react at temperatures ranging from room temperature to the boiling point of the solution whereby a precipitate is formed, which precipitate is filtered off, dried and finally reduced to a metallic powder.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: January 14, 1997
    Assignee: Sandvik AB
    Inventors: Mamoun Muhammed, Sverker Wahlberg, Ingmar Grenthe
  • Method of preparing multicarbide powders for hard materials
    Patent number: 5584907
    Abstract: There is now provided a method for preparing a powder containing W and Co and/or Ni from APT and a soluble salt of Co(Ni) by a chemical reaction in a water suspension at temperatures from room temperature to the boiling point of the solution whereafter the formed powder is filtered off, dried and reduced to a metallic powder. Additional metals from groups IVa, Va or VIa of the periodic table of the elements are added to the suspension as compounds like oxides, hydroxides, soluble or insoluble salts.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: December 17, 1996
    Assignee: Sandvik AB
    Inventors: Mamoun Muhammed, Inger Grenthe, Sverker Wahlberg