Patents by Inventor Mark Howard Giammattei

Mark Howard Giammattei 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).

  • Compounding filled silicone compositions
    Patent number: 6388001
    Abstract: High levels of silica, processing fluid and high molecular weight silicone polymer are compounded into a homogeneous silica filled composition without forming a preconcentrate of fumed silica and polymer. A fumed silica is fed into a unitary continuous compounding apparatus at a first location prior to addition of the silicone polymer. The fumed silica is then compounded with the silicone polymer, which is fed into the compounding apparatus at a location down-stream in the compounding apparatus from the first location. The compounding apparatus can be a co-rotating, intermeshing double screw extruder.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: May 14, 2002
    Assignee: General Electric Company
    Inventors: Norberto Silvi, Mark Howard Giammattei
  • Poly(phenylene ether)-polyamide resin blends, method, and articles made therefrom
    Patent number: 6362263
    Abstract: Impact modified, compatibilized poly(phenylene ether)-polyamide compositions containing either a polybutene or an organosiloxane mixture give molded parts with good surface appearance, improved flow at high shear rate, and improved low temperature impact strength in comparison to control blends without added organosiloxane mixture or polybutene.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: March 26, 2002
    Assignee: General Electric Company
    Inventors: Sterling Bruce Brown, Norberto Silvi, Mark Howard Giammattei, Navjot Singh, Farid Fouad Khouri
  • Method for making uncompatibilized polyphenylene ether-polyamide compositions
    Patent number: 6316551
    Abstract: Compatible polyphenylene ether-polyamide blends are prepared without the need for compatibilizing compounds such as citric acid or maleic anhydride. The preparation method includes melt blending of the constituents, with other materials such as impact modifiers and fillers optionally being present, at an apparatus temperature maintained no lower than about 295° C. and a pressure maintained below about 200 torr. Blending is preferably by extrusion, with filler and optionally a portion of the polyamide being introduced downstream.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: November 13, 2001
    Assignee: General Electric Company
    Inventors: Norberto Silvi, Mark Howard Giammattei
  • Uncompatibilized polyphenylene ether-polyamide compositions
    Patent number: 6107415
    Abstract: Compatible polyphenylene ether-polyamide blends are prepared without the need for compatibilizing compounds such as citric acid or maleic anhydride. The preparation method includes melt blending of the constituents, with other materials such as impact modifiers and fillers optionally being present, at an apparatus temperature maintained no lower than about 295.degree. C. and a pressure maintained below about 200 torr. Blending is preferably by extrusion, with filler and optionally a portion of the polyamide being introduced downstream.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: August 22, 2000
    Assignee: General Electric Company
    Inventors: Norberto Silvi, Mark Howard Giammattei