Patents by Inventor William J. Libbey

William J. Libbey 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).

  • Ethylene polymer composition for blow molding
    Patent number: 4617352
    Abstract: Polyethylene blends for blow molding processes are disclosed, comprising from 12 to 25 weight percent of high molecular weight component, 5 to 83 weight percent of a medium molecular weight component, and 5 to 83 weight percent of the low molecular weight component, wherein the ratio of high molecular weight to medium molecular weight is greater or equal to 1.7 and the ratio of medium molecular weight to low molecular weight is greater or equal to 1.7, and wherein the blend has a melt index in the range of 0.01 to 2.0.
    Type: Grant
    Filed: May 30, 1985
    Date of Patent: October 14, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Matthew A. Page, William J. Libbey, Allan J. Lundeen
  • Ethylene polymer composition for blow molding
    Patent number: 4525322
    Abstract: Polyethylene blends for blow molding processes are disclosed, comprising from 12 to 25 weight percent of high molecular weight component, 5 to 83 weight percent of a medium molecular weight component, and 5 to 83 weight percent of the low molecular weight component, wherein the ratio of high molecular weight to medium molecular weight is greater or equal to 1.7 and the ratio of medium molecular weight to low molecular weight is greater or equal to 1.7, and wherein the blend has a melt index in the range of 0.01 to 2.0.
    Type: Grant
    Filed: June 28, 1983
    Date of Patent: June 25, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Matthew A. Page, William J. Libbey, Allan J. Lundeen
  • Transparent and translucent poly(butene-1)
    Patent number: 4219639
    Abstract: A method for altering the transparency of a stable hexagonal polymorphic poly(butene-1) obtained from unstable tetragonal crystalline poly(butene-1) comprising contacting the tetragonal crystalline poly(butene-1) with a volatile solvent for a short time, then removing from the solvent, and allowing solvent adhereing to the poly(butene-1) to evaporate. The finished polymer can be opaque, transparent, or translucent depending upon the solvent and temperature used.
    Type: Grant
    Filed: August 16, 1978
    Date of Patent: August 26, 1980
    Assignee: Conoco, Inc.
    Inventors: Mark P. Mack, William J. Libbey
  • Separation of alkyl alcohols from alkyldimethylamines
    Patent number: 4100209
    Abstract: Alkyl alcohols are separated from alkyldimethylamines using an immiscible solvent mixture comprising a polar solvent (e.g. dimethylformamide) and a nonpolar solvent (e.g. hexane). The process is particularly useful for C.sub.12-14 alcohols and C.sub.12-14 alkyldimethylamines.
    Type: Grant
    Filed: November 12, 1976
    Date of Patent: July 11, 1978
    Assignee: Continental Oil Company
    Inventor: William J. Libbey