Patents by Inventor Harvey L. Stein

Harvey L. Stein 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).

  • Composition and process for making porous articles from ultra high molecular weight polyethylene
    Patent number: 4925880
    Abstract: Porous shaped articles made from a molded composite of ultra high molecular weight polyethylene and polyethylene wax are disclosed. These articles are produced by free-sintering a non intensively mixed blend of UHMW-PE particles and particles of a polyethylene wax. The process involves mixing the UHMW-PE and wax both in powdered form until a heterogeneous mixture is formed, but under conditions which do not lead to any substantial fracturing of the UHMW-PE particles or melting of either component. The heterogeneous mix is then transferred to a press mold to form a shape and pressure is applied sufficient only to maintain the enclosed volume of the shape. The mold is heated to a temperature above the melting point of the UHMW-PE for a period of time to allow the particles to soften, expand, and contact one another at their surfaces. The mixture is then quickly cooled.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: May 15, 1990
    Assignee: Hoechst Celanese Corporation
    Inventor: Harvey L. Stein
  • Composition and process for making porous articles from ultra high molecular weight polyethylene
    Patent number: 4880843
    Abstract: Porous shaped articles made from a molded composite of ultra high molecular weight polyethylene and polyethylene wax are disclosed. These articles are produced by free-sintering a non intensively mixed blend of UHMW-PE particles and particles of a polyethylene wax. The process involves mixing the UHMW-PE and wax both in powdered form until a heterogeneous mixture is formed, but under conditions which do not lead to any substantial fracturing of the UHMW-PE particles or melting of either component. The heterogeneous mix is then transferred to a press mold to form a shape and pressure is applied sufficient only to maintain the enclosed volume of the shape. The mold is heated to a temperature above the melting point of the UHMW-PE for a period of time to allow the particles to soften, expand, and contact one another at their surfaces. The mixture is then quickly cooled.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: November 14, 1989
    Assignee: Hoechst Celanese Corporation
    Inventor: Harvey L. Stein
  • Tool pouch for bucket
    Patent number: D345237
    Type: Grant
    Filed: August 19, 1992
    Date of Patent: March 15, 1994
    Inventor: Harvey L. Stein
  • Tool tray organizer
    Patent number: D358933
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: June 6, 1995
    Assignee: Hometown Advantage, Inc.
    Inventor: Harvey L. Stein
  • Lid/seat for a bucket
    Patent number: D391717
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: March 3, 1998
    Assignee: Hometown Advantage, Inc.
    Inventor: Harvey L. Stein