Patents by Inventor Ralph S. Blake

Ralph S. Blake 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).

  • Extrusion blow molding of thermotropic liquid crystalline polymers
    Patent number: 5336464
    Abstract: An extrusion blow molding process for a heat-treated, liquid crystalline polymer is provided. By the process, molten polymer having improved melt strength, is vertically extruded downward into space through a parison-forming, annular gap. Sag resistant parisons are formed. Beneficially, the parisons may be formed periodically. Advantageously, large-sized parts or structures may be produced.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: August 9, 1994
    Assignee: Hoechst Celanese Corporation
    Inventors: Cheryl F. Corallo, Robert B. Sandor, Ralph S. Blake
  • Extrusion blow molding of filled liquid crystal polymers
    Patent number: 5306461
    Abstract: An extrusion blow molding process for a filled, liquid crystalline polymer is provided. By the process, molten polymer having improved melt strength, is vertically extruded downward into space through a parison-forming, annular gap. Sag resistant parisons are formed. Beneficially, the parisons may be formed periodically. Advantageously, large-sized parts or structures may be produced.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: April 26, 1994
    Assignee: Hoechst Celanese Corporation
    Inventors: Cheryl F. Corallo, Robert B. Sandor, Ralph S. Blake, Derrick B. McKie
  • Process of making a sintered polybenzimidazole article
    Patent number: 4861537
    Abstract: Sintered polybenzimidazole articles are obtained by compacting a particulate, dried polybenzimidazole resin under a pressure of 2,000 to 10,000 psi in a mold, heating the formed article to a temperature in the range of 825.degree. to 950.degree. F. for at least four hours, cooling the polybenzimidazole article to below 800.degree. F. while maintaining the article under a pressure of 2,000 to 10,000 psi, and thereafter heating the constrained formed polybenzimidazole article to a temperature in the range of 825.degree. to 950.degree. F. for at least one hour.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: August 29, 1989
    Assignee: Hoechst Celanese Corporation
    Inventors: Bennett C. Ward, Edwardo Alvarez, Ralph S. Blake
  • Sintered polybenzimidazole article
    Patent number: 4814530
    Abstract: Sintered polybenzimidazole articles are obtained by compacting a particulate, dried polybenzimidazole resin under a pressure of 2,000 to 10,000 psi in a mold, heating the formed article to a temperature in the range of 825.degree. to 950.degree. F. for at least four hours, cooling the polybenzimidazole article to below 800.degree. F. while maintaining the article under a pressure of 2,000 to 10,000 psi, and thereafter heating the constrained formed polybenzimidazole article to a temperature in the range of 825.degree. to 950.degree. F. for at least one hour.
    Type: Grant
    Filed: September 3, 1987
    Date of Patent: March 21, 1989
    Assignees: Hoechst Celanese Corporation, Alpha Precision Plastics, Inc.
    Inventors: Bennett C. Ward, Edwardo Alvarez, Ralph S. Blake