Patents by Inventor David A. Eversdyk

David A. Eversdyk 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).

  • Patent number: 8876365
    Abstract: The invention provides a mixing system comprising the following: A) at least one extensional flow mixer comprising: a generally open and hollow body having a contoured outer surface and having: a single entrance port and a single exit port; a design for compressing a bulk stream, and a design for broadening the bulk stream and the at least one injected additive stream; B) a flow conductor; and C) a primary additive stream injector, as described herein; and wherein the extensional flow mixer is followed by D) a first helical static mixing element that is at least one half “flow conductor diameter (D1)” downstream of the exit port of the extensional flow mixer; and wherein the mixing system comprises at least four helical static mixing elements, placed such that the leading edge of the first helical static mixing element is located perpendicular to the main axis (major axis) of the exit port of the extensional flow mixer.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: November 4, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: Maria Pollard, Steven R. Strand, David A. Eversdyk, Matthias Schaefer
  • Publication number: 20120287744
    Abstract: The invention provides a mixing system comprising the following: A) at least one extensional flow mixer comprising: a generally open and hollow body having a contoured outer surface and having: a single entrance port and a single exit port; a means for compressing a bulk stream flowing through the generally open and hollow body in a direction of flow, and at least one injected additive stream introduced at the single entrance port in the direction of flow; and a means for broadening the bulk stream and the at least one injected additive stream, such that an interfacial area between the bulk stream and the at least one injected additive stream is increased as the bulk stream and the at least one injected additive stream flow through the generally open and hollow body in the direction of flow to promote mixing of the bulk stream and the at least one injected additive stream; B) a flow conductor having an axis and having a generally open and hollow flow mixer body cured therein; and C) a primary additive stream
    Type: Application
    Filed: January 20, 2011
    Publication date: November 15, 2012
    Applicant: Dow Global Technologies LLC
    Inventors: Maria Pollard, Steven R. Strand, David A. Eversdyk, Matthias Schaefer
  • Patent number: 8076421
    Abstract: Film layers made from formulated polymer compositions are disclosed. Film layers made from such formulated compositions have surprisingly good (for example, low) water vapor transmission rates and are particularly useful for packaging dry goods such as cereal. The polymer compositions preferably have at least one homogeneous ethylene homopolymer and at least one heterogeneously branched ethylene polymer. The homogeneous ethylene homopolymer has a molecular weight much higher than that of the heterogeneously branched ethylene polymer, although the density of each is preferably higher than about 0.95 g/cm3.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: December 13, 2011
    Assignee: Dow Global Technologies LLC
    Inventors: Mridula Kapur, David A. Eversdyk, Wenbin Liang, Kenneth S. Laverdure, David T. Gillespie
  • Publication number: 20110182134
    Abstract: A mixing system is disclosed comprising at least one extensional flow mixer comprising: a generally open and hollow body having a contoured outer surface and having: a single entrance port and a single exit port; a means for compressing a bulk stream flowing through the generally open and hollow body in a direction of flow and at least one injected additive stream introduced at the single entrance port in the direction of flow; and a means for broadening the bulk stream and the at least one injected additive stream such that an interfacial area between the bulk stream and the at least one injected additive stream is increased as the bulk stream and the at least one injected additive stream flow through the generally open and hollow body in the direction of flow to promote mixing of the bulk stream and the at least one injected additive stream, a flow conductor having an axis and having a generally open and hollow flow mixer body secured therein; and a primary additive stream injector positioned at the entra
    Type: Application
    Filed: January 22, 2010
    Publication date: July 28, 2011
    Applicant: Dow Global Technologies Inc.
    Inventors: Maria Pollard, Steven R. Strand, David A. Eversdyk, Matthias Schaefer
  • Patent number: 6451916
    Abstract: The present invention pertains to a continuous process and polymerization system characterized by separate injection of catalyst and make-up feed, an ethylene interpolymer composition characterized as having broad molecular weight distribution (MWD) and optimized compositional uniformity, a process for making such a composition and a fabricated article made from such composition. The novel composition is characterized as having a melt flow ratio, I10/I2, from 8 to 30, a Mw/Mn of greater than 4 as determined by gel permeation chromatography, a melt index, I2, from 0.01 to 1000 grams/10 minutes, preferably greater that 0.1 to 10 grams/10 minutes, and a density less than 0.945 g/cm3. The novel composition exhibits good processibility and improved toughness properties, especially excellent film tear and impact resistance, and is particularly well-suited for use in applications such as high performance trash can liners and heavy duty shipping bags.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: September 17, 2002
    Assignee: The Dow Chemical Company Midland
    Inventors: Kenneth W. Anderson, Pak-Wing S. Chum, David A. Eversdyk, Lonnie G. Hazlitt, Pradeep Jain, Kalyan Sehanobish, Li-Min Tau
  • Patent number: 6319989
    Abstract: The present invention pertains to a continuous process and polymerization system characterized by separate injection of catalyst and make-up feed, an ethylene interpolymer composition characterized as having broad molecular weight distribution (MWD) and optimized compositional uniformity, a process for making such a compostion and a fabricated article made from such composition. The novel composition is characterized as having a melt flow ratio, I10/I2, from 8 to 30, a Mw/Mn of greater than 4 as determined by gel permeation chromatography, a melt index, I2, from 0.01 to 1000 grams/10 minutes, preferably greater that 0.1 to 10 grams/10 minutes, and a density less than 0.945 g/cm3. The novel composition exhibits good processibility and improved toughness properties, especially excellent film tear and impact resistance, and is particularly well-suited for use in applications such as high performance trash can liners and heavy duty shipping bags.
    Type: Grant
    Filed: January 20, 2000
    Date of Patent: November 20, 2001
    Assignee: The Dow Chemical Company
    Inventors: Kenneth W. Anderson, Pak-Wing S. Chum, David A. Eversdyk, Lonnie G. Hazlitt, Pradeep Jain, Kalyan Sehanobish, Li-Min Tau
  • Patent number: 5977251
    Abstract: A solution polymerization system for polymerizing a olefin monomer by reacting the monomer with catalyst and solvent has been invented. The system in one aspect including a flow loop with a product polymer outlet, the flow loop forming a recycling reactor, a catalyst inlet on the flow loop through which catalyst and solvent flow into the flow loop, a monomer inlet on the flow loop through which monomer and solvent flow into the flow loop and, with the catalyst, form a reactant materials stream, a first heat exchanger on the flow loop for receiving the reactant materials stream and any formed polymer and for removing heat of reaction or polymerization from the flow loop, and pump apparatus for pumping the reactant materials stream and formed polymer in the flow loop and from the first heat exchanger to the product polymer outlet.
    Type: Grant
    Filed: April 1, 1997
    Date of Patent: November 2, 1999
    Assignee: The Dow Chemical Company
    Inventors: Che I. Kao, R. Bruce Combs, Gary A. Camp, David A. Eversdyk, Pradeep Jain, Greg A. Winter, Jeff H. Stultz
  • 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
  • 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
  • Patent number: 5384373
    Abstract: A homogeneous, random interpolymer of ethylene and an alpha-olefinically unsaturated carboxylic acid or ester having a melt flow rate in the range of about 0.1 to about 300 g/10 minutes, as determined by ASTM D-1238 (190.degree. C./2160 g), is improved during its manufacture when made in a substantially constant environment in a stirred autoclave under substantially steady-state conditions of temperature, pressure, and flow rates, said temperature and pressure being sufficient to produce a single phase reaction, using a free-radical initiator, said improvement being obtained by the use of a minor amount of a telogenic modifier in the reaction mixture, the process being further characterized by the use of either, or both, of (a) a temperature which is lower than that which would be required without the presence of the telogen, or (b) a pressure which is higher than that which would be required without the presence of the modifier.
    Type: Grant
    Filed: May 18, 1994
    Date of Patent: January 24, 1995
    Assignee: The Dow Chemical Company
    Inventors: Osborne K. McKinney, David A. Eversdyk, Michael E. Rowland
  • Patent number: 4988781
    Abstract: A homogeneous, random interpolymer of ethylene and an alpha-olefinically unsaturated carboxylic acid or ester having a melt flow rate in the range of about 0.1 to about 300 g/10 minutes, as determined by ASTM D-1238 (190.degree. C./2160 g), is improved during its manufacture when made in a substantially constant environment in a stirred autoclave under substantially steady-state conditions of temperature, pressure, and flow rates, said temperature and pressure being sufficient to produce a single phase reaction, using a free-radical initiator, said improvement being obtained by the use of a minor amount of a telogenic modifier in the reaction mixture, the process being further characterized by the use of either, or both, of (a) a temperature which is lower than that which would be required without the presence of the telogen, or (b) a pressure which is higher than that which would be required without the presence of the modifier.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: January 29, 1991
    Assignee: The Dow Chemical Company
    Inventors: Osborne K. McKinney, David A. Eversdyk, Michael E. Rowland
  • Patent number: 4599392
    Abstract: Homogeneous, random interpolymers of ethylene and lesser amounts by weight of olefinically-unsaturated comonomers are prepared in a substantially constant environment, substantially steady-state reaction mixture, in a well-stirred autoclave reactor, in continuous single-phase operation, using elevated synthesis conditions wherein the temperature and pressure are elevated to an amount high enough to approach, reach, or surpass the molecular weight distribution boundary.
    Type: Grant
    Filed: June 13, 1983
    Date of Patent: July 8, 1986
    Assignee: The Dow Chemical Company
    Inventors: Osborne K. McKinney, David P. Flores, David A. Eversdyk