Patents by Inventor Franklin A. Renda

Franklin A. Renda 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).

  • Slagline sleeve for submerged entry nozzle composition therefore
    Patent number: 6586355
    Abstract: An improved submerged entry nozzle is provided which is useful in the casting of aluminum killed molten steel. The nozzle has an improved slagline sleeve or collar which surrounds the outer portion of the nozzle to protect it from corrosion during the casting process. The slagline sleeve is made from resin bonded zirconia/graphite which has been formulated so that upon curing of the resin to form resite, there is a reduction in the contractile tendency which results in a reduction in stress fracturing. The reduction of the contractile tendency and the resulting resistance to stress fracturing is achieved by adding an effective amount of calcium oxide to the resin-zirconia-graphite mixture which is used to form the sleeve.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: July 1, 2003
    Assignee: Baker Refractories
    Inventors: Donald B. Hoover, Franklin A. Renda, Donald J. Griffin, Colin Richmond
  • Slagline sleeve for submerged entry nozzle composition therefore
    Publication number: 20020177517
    Abstract: An improved submerged entry nozzle is provided which is useful in the casting of aluminum killed molten steel. The nozzle has an improved slagline sleeve or collar which surrounds the outer portion of the nozzle to protect it from corrosion during the casting process. The slagline sleeve is made from resin bonded zirconia/graphite which has been formulated so that upon curing of the resin to form resite, there is a reduction in the contractile tendency which results in a reduction in stress fracturing. The reduction of the contractile tendency and the resulting resistance to stress fracturing is achieved by adding an effective amount of calcium oxide to the resin-zirconia-graphite mixture which is used to form the sleeve.
    Type: Application
    Filed: February 11, 2002
    Publication date: November 28, 2002
    Applicant: Baker Refractories, Inc.
    Inventors: Donald B. Hoover, Franklin A. Renda, Donald J. Griffin, Colin Richmond
  • Slagline sleeve for submerged entry nozzle and composition therefor
    Patent number: 6410469
    Abstract: An improved submerged entry nozzle is provided which is useful in the casting of aluminum killed molten steel. The nozzle has an improved slagline sleeve or collar which surrounds the outer portion of the nozzle to protect it from corrosion during the casting process. The slagline sleeve is made from resin bonded zirconia/graphite which has been formulated so that upon curing of the resin to form resite, there is a reduction in the contractile tendency which results in a reduction in stress fracturing. The reduction of the contractile tendency and the resulting resistance to stress fracturing is achieved by adding an effective amount of calcium oxide to the resin-zirconia-graphite mixture which is used to form the sleeve.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: June 25, 2002
    Assignee: Baker Refractories, Inc.
    Inventors: Donald B. Hoover, Franklin A. Renda, Donald J. Griffin, Colin Richmond