Patents by Inventor Michael F. Langohr

Michael F. Langohr 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).

  • Articles having elevated temperature elasticity made from irradiated and crosslinked ethylene polymers and method for making the same
    Patent number: 6667351
    Abstract: The present invention relates to elastic articles comprising a crosslinked or crosslinkable ethylene polymer and a method for making the same. In particular, the invention relates to a shaped article (e.g. film or fiber) characterized by improved elasticity at elevated temperatures and comprising a substantially cured, irradiated, or crosslinked (or curable, irradiated or crosslinkable) homogeneously branched ethylene polymer. The improved elastic article of the present invention is particularly suitable for use in applications where good elasticity must be maintained at elevated temperatures such as, for example, personal hygiene items and disposable infection-control garments at body temperatures of about 100° F. (38° C.).
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: December 23, 2003
    Assignee: Dow Global Technologies Inc.
    Inventors: Michael F. Langohr, Rajen M. Patel, Selim Bensason, Jill M. Martin, Thoi H. Ho, Nancy J. Schrock
  • Articles having elevated temperature elasticity made from irradiated and crosslinked ethylene polymers and method for making the same
    Patent number: 6500540
    Abstract: The present invention relates to elastic articles comprising a crosslinked or crosslinkable ethylene polymer and a method for making the same. In particular, the invention relates to a shaped article (e.g. film or fiber) characterized by improved elasticity at elevated temperatures and comprising a substantially cured, irradiated, or crosslinked (or curable, irradiated or crosslinkable) homogeneously branched ethylene polymer. The improved elastic article of the present invention is particularly suitable for use in applications where good elasticity must be maintained at elevated temperatures such as, for example, personal hygiene items and disposable infection-control garments at body temperatures of about 100° F. (38° C.).
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: December 31, 2002
    Assignee: The Dow Chemical Company
    Inventors: Michael F. Langohr, Selim Bensason, Rajen M. Patel, Jill M. Martin, Thoi H. Ho, Nancy J. Schrock
  • Articles having elevated temperature elasticity made from irradiated and crosslinked ethylene polymers and method for making the same
    Publication number: 20020132923
    Abstract: The present invention relates to elastic articles comprising a crosslinked or crosslinkable ethylene polymer and a method for making the same. In particular, the invention relates to a shaped article (e.g. film or fiber) characterized by improved elasticity at elevated temperatures and comprising a substantially cured, irradiated, or crosslinked (or curable, irradiated or crosslinkable) homogeneously branched ethylene polymer. The improved elastic article of the present invention is particularly suitable for use in applications where good elasticity must be maintained at elevated temperatures such as, for example, personal hygiene items and disposable infection-control garments at body temperatures of about 100° F. (38° C.).
    Type: Application
    Filed: February 28, 2002
    Publication date: September 19, 2002
    Applicant: The Dow Chemical Company
    Inventors: Michael F. Langohr, Rajen M. Patel, Selim Bensason, Jill M. Martin, Thoi H. Ho, Nancy J. Schrock
  • High drawdown extrusion composition and process
    Patent number: 5674342
    Abstract: A process and thermoplastic composition for high line speed extrusion without high neck-in and draw resonance are disclosed. The thermoplastic composition is made of at least one ethylene polymer having a Dow Rheology Index (DRI) of at least 0.1 or, alternately, at least one substantially linear ethylene polymer, used alone or in combination with at least one high-pressure ethylene polymer and/or with at least one heterogeneous linear olefin polymer.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: October 7, 1997
    Assignee: The Dow Chemical Company
    Inventors: Todd J. Obijeski, Shih-Yaw Lai, Rajen M. Patel, Lichih R. Peng, Michael F. Langohr, David C. Kelley, David A. Eversdyk, Nicole F. Whiteman
  • High drawdown extrusion process with greater resistance to draw resonance
    Patent number: 5395471
    Abstract: A process for extruding a thermoplastic composition at higher drawdown rates with less neck-in and greater resistance to draw resonance as well as processes for extrusion coating a substrate and for making an extrusion-cast film are disclosed. The thermoplastic composition is made of at least one substantially linear ethylene polymer used alone or in combination with at least one high-pressure ethylene polymer and/or with at least one heterogeneous linear olefin polymer.
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: March 7, 1995
    Assignee: The Dow Chemical Company
    Inventors: Todd J. Obijeski, Shih-Yaw Lai, Rajen M. Patel, Lichih R. Peng, Michael F. Langohr, David C. Kelley, David A. Eversdyk, Nicole F. Whiteman