Patents by Inventor Tomas Rostwall

Tomas Rostwall 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 making tools or components
    Patent number: 7303722
    Abstract: The present invention relates to a method of making a sintered body comprising one or more hard constituents in a binder phase by injection molding or extrusion. According to the invention, the binder system comprises 30-70 wt % poly(ethylene-co-vinylacetate) and balance (Polyethylene)-blend-(Poly(oxy-1,2-ethanediyl), .alpha.-hydro-.omega.-hydroxy)-based wax. The solids loading of the feedstock, ?, is 0.51<?<0.53, calculated using the equation: ? = ? f - ? b ? s - ? b where ?s is the density of the material as sintered, ?b is the density of the binder system and ?f is the density of the feedstock, measured with a helium pycnometer. Debinding is performed by heating in a furnace in flowing hydrogen atmosphere.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: December 4, 2007
    Assignee: Seco Tools AB
    Inventors: Johnny Bruhn, Evert Löwdin, Tomas Rostwall