Patents by Inventor Allan J. Lundeen

Allan J. Lundeen 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).

  • Process for the manufacture of linear polyethylene containing .alpha.-alkene commonomers
    Patent number: 5236998
    Abstract: A process for making a blend of high-density polyethylene polymers containing one or more C3 to C12 .alpha.-olefin comonomers. The process begins in two parallel streams. In one stream ethylene is polymerized alone, and in the second stream ethylene is polymerized with the comonomer(s). The two streams are combined in a subsequent reactor where the polymerization process is completed. The polymerization produces a polymer wherein the comonomer is concentrated in the higher molecular weight fractions.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: August 17, 1993
    Assignee: Occidental Chemical Corporation
    Inventors: Allan J. Lundeen, James E. Feig
  • 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
  • Polyolefin with improved processing properties
    Patent number: 4539374
    Abstract: Processing properties of polyethylene resins are improved while retaining original physical properties by incorporating less than 1.5 weight percent of high molecular weight, non-crystalline polyolefins into the polyolefin resins. The resulting compositions exhibit reduced melt viscosity at high shear rates while providing essentially unchanged finished physical properties of the polyethylene article.
    Type: Grant
    Filed: March 21, 1984
    Date of Patent: September 3, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Jeff T. Fenton, Allan J. Lundeen, Mark P. Mack, Jean A. Merrick
  • 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
  • Preparation of o-benzylphenol
    Patent number: 4117243
    Abstract: A process for preparing o-benzylphenol is disclosed. The process comprises heating benzyl phenyl ether, either in liquid or vapor phase, in the presence of an effective amount of activated alumina catalyst.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: September 26, 1978
    Assignee: Continental Oil Company
    Inventors: Charles M. Starks, Allan J. Lundeen
  • Preparation of cinnamyl-substituted phenols
    Patent number: 4105698
    Abstract: A process for preparing ortho-substituted cinnamyl phenols is disclosed. The process comprises heating a mixture of cinnamyl alcohol and phenol in the presence of an effective amount of activated alumina.
    Type: Grant
    Filed: February 16, 1977
    Date of Patent: August 8, 1978
    Assignee: Continental Oil Company
    Inventors: Charles M. Starks, Allan J. Lundeen
  • Oxidation stabilized organic compositions
    Patent number: 3962124
    Abstract: The use of a condensation reaction product of (1) meta-cresol, para-cresol or a mixture of meta and para cresols, and (2) an aldehyde defined by R-CHO wherein R is hydrogen or an alkyl group having at least 1 carbon atom as an antioxidant in organic compositions.
    Type: Grant
    Filed: March 25, 1974
    Date of Patent: June 8, 1976
    Assignee: Continental Oil Company
    Inventors: Kaye L. Motz, Allan J. Lundeen