Patents by Inventor Steven R. Lakso

Steven R. Lakso 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: 9579627
    Abstract: A novel microporous carbon molecular sieve may be used as the basis for carbon adsorbent pellets that have discrete areas of carbonized binder and of carbonized precursor, macropores having an average pore diameter greater than or equal to 1 micrometer and a total macroporosity of at least 30 percent, both as measured by mercury porosimetry, and micropores that are capable of selectively admitting a C2-C3 alkene and excluding a C2-C3 alkane, and a total microporosity ranging from 10 percent to 30 percent. The pellets may be prepared by pyrolyzing a pellet structure comprising a carbon forming, non-melting binder and a non-porous gel type sulfonated polystyrene precursor at a temperature ranging from 500° C. to 1000° C., under an inert atmosphere and other conditions suitable to form the described pellets. The pellets are particularly useful in pressure swing and temperature swing adsorption processes to separate C2-C3 alkane/alkene mixtures.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: February 28, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Junqiang Liu, Mark K. Brayden, Edward M. Calverley, Steven R. Lakso, Yujun Liu, Marcos V. Martinez
  • Publication number: 20160008787
    Abstract: A novel microporous carbon molecular sieve may be used as the basis for carbon adsorbent pellets that have discrete areas of carbonized binder and of carbonized precursor, macropores having an average pore diameter greater than or equal to 1 micrometer and a total macroporosity of at least 30 percent, both as measured by mercury porosimetry, and micropores that are capable of selectively admitting a C2-C3 alkene and excluding a C2-C3 alkane, and a total microporosity ranging from 10 percent to 30 percent. The pellets may be prepared by pyrolyzing a pellet structure comprising a carbon forming, non-melting binder and a non-porous gel type sulfonated polystyrene precursor at a temperature ranging from 500° C. to 1000° C., under an inert atmosphere and other conditions suitable to form the described pellets. The pellets are particularly useful in pressure swing and temperature swing adsorption processes to separate C2-C3 alkane/alkene mixtures.
    Type: Application
    Filed: March 24, 2014
    Publication date: January 14, 2016
    Inventors: Junqiang Liu, Mark K. Brayden, Edward M. Calverley, Steven R. Lakso, Yujun Liu, Marcos V. Martinez
  • Patent number: 8609751
    Abstract: The instant invention generally provides polymer microfiller composite comprising a molecularly self-assembling material and a microfiller, and a process of making and an article comprising the polymer microfiller composite.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: December 17, 2013
    Assignee: Dow Global Technologies LLC
    Inventors: Jerry E. White, Hari Parvatareddy, Felix Achille, Leonardo C. Lopez, Rudolf J. Koopmans, Rene Broos, Steven R. Lakso
  • Patent number: 8524796
    Abstract: The instant invention generally provides an activated polymer composition containing an active agent (i.e., a chemically- or biologically-active agent), an activated fiber comprising the activated polymer composition, an activated-fiber composite comprising the activated fiber and a fiberweb support, processes of fabricating the activated fiber and activated-fiber composition, and an article comprising the activated polymer composition. The instant invention also generally provides a highly filled polymer filler composite comprising a molecularly self-assembling (MSA) material and a mineral filler or conductive filler dispersed in the MSA material, and a process of making and article comprising the highly filled polymer filler composite.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: September 3, 2013
    Inventors: Young-Sam Kim, Leonardo C. Lopez, Scott T. Matteucci, Steven R. Lakso
  • Patent number: 8513154
    Abstract: The present invention provides porous body precursors and shaped porous bodies. Also included are catalysts and other end-use products based upon the shaped porous bodies and thus the porous body precursors. Finally, processes for making these are provided. The porous body precursors, comprise one or more topography-enhancing additives, i.e., additives that are capable of at least marginally enhancing one or more of surface area, aspect ratio, pore volume, median pore diameter, surface morphology, etc. Downstream products need not necessarily comprise the topography-enhancing additives in order to exhibit the benefits of their inclusion in the porous body precursors.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: August 20, 2013
    Assignee: Dow Technology Investments, LLC
    Inventors: Timothy L. Allen, Todd R. Bryden, Kevin E. Howard, Steven R. Lakso, Peter C. Lebaron, Jamie L. Lovelace, Juliana G. Serafin, Sten A. Wallin
  • Publication number: 20110136659
    Abstract: The present invention provides porous body precursors and shaped porous bodies. Also included are catalysts and other end-use products based upon the shaped porous bodies and thus the porous body precursors. Finally, processes for making these are provided. The porous body precursors, comprise one or more topography-enhancing additives, i.e., additives that are capable of at least marginally enhancing one or more of surface area, aspect ratio, pore volume, median pore diameter, surface morphology, etc. Downstream products need not necessarily comprise the topography-enhancing additives in order to exhibit the benefits of their inclusion in the porous body precursors.
    Type: Application
    Filed: April 29, 2009
    Publication date: June 9, 2011
    Inventors: Timothy L. Allen, Todd R. Bryden, Kevin E. Howard, Steven R. Lakso, Peter C. Lebaron, Jamie L. Lovelace, Juliana G Serafin, Sten Wallin
  • Publication number: 20100137478
    Abstract: The instant invention generally provides polymer microfiller composite comprising a molecularly self-assembling material and a microfiller, and a process of making and an article comprising the polymer microfiller composite.
    Type: Application
    Filed: November 20, 2009
    Publication date: June 3, 2010
    Inventors: Jerry E. White, Hari Parvatareddy, Felix Achille, Leonardo C. Lopez, Rudolf J. Koopmans, Rene Broos, Scott T. Matteucci, Steven R. Lakso
  • Publication number: 20100056816
    Abstract: This invention relates to shaped porous bodies of alpha-alumina platelets which are useful as catalyst carriers, filters, membrane reactors, and preformed bodies for composites. This invention also relates to processes of making such shaped bodies and processes for modifying the surface composition of alpha-alumina.
    Type: Application
    Filed: July 20, 2007
    Publication date: March 4, 2010
    Inventors: Sten A. Wallin, Juliana G. Serafin, Madan M. Bhasin, Steven R. Lakso
  • Publication number: 20100041292
    Abstract: The instant invention generally provides an activated polymer composition containing an active agent (i.e., a chemically- or biologically-active agent), an activated fiber comprising the activated polymer composition, an activated-fiber composite comprising the activated fiber and a fiberweb support, processes of fabricating the activated fiber and activated-fiber composition, and an article comprising the activated polymer composition. The instant invention also generally provides a highly filled polymer filler composite comprising a molecularly self-assembling (MSA) material and a mineral filler or conductive filler dispersed in the MSA material, and a process of making and article comprising the highly filled polymer filler composite.
    Type: Application
    Filed: August 12, 2009
    Publication date: February 18, 2010
    Inventors: Young-Sam Kim, Leonardo C. Lopez, Scott T. Matteucci, Steven R. Lakso
  • Patent number: 7479264
    Abstract: A method for producing synthetic magadiite, including the step of: heating a liquid aqueous colloidal silica suspension, the liquid aqueous colloidal silica suspension having a mole ratio of sodium hydroxide to silica and a mole ratio of water to silica effective to produce a synthetic magadiite wherein more than fifty percent by weight of the synthetic magadiite is platy synthetic magadiite. The synthetic platy magadiite can be converted to the acid form and: (a) heated to produce quartz-like plates; or Coalkylated to produce an organophilic material. In another aspect the instant invention is a method for the production of platy sodium octasilicate which includes the step of: heating a liquid aqueous colloidal silica dispersion containing silica, sodium oxide, and water, the mole ratio of the silica to the sodium oxide being in the range of from about 3.5 to about 10.
    Type: Grant
    Filed: January 24, 2006
    Date of Patent: January 20, 2009
    Assignee: The Dow Chmeical Company
    Inventors: Juan M. Garces, Steven R. Lakso, Brian J. Schoeman
  • Patent number: 7063825
    Abstract: A method for producing synthetic magadiite, including the step of: heating a liquid aqueous colloidal silica suspension, the liquid aqueous colloidal silica suspension having a mole ratio of sodium hydroxide to silica and a mole ratio of water to silica effective to produce a synthetic magadiite wherein more than fifty percent by weight of the synthetic magadiite is platy synthetic magadiite. The synthetic platy magadiite can be converted to the acid form and: (a) heated to produce quartz-like plates; or (b) alkylated to produce an organophilic material. A method for the production of platy sodium octasilicate and a method for preparing a liquid aqueous colloidal silica dispersion having a mole ratio of silica to sodium oxide of 3.5 to 10 are further disclosed.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: June 20, 2006
    Assignee: The Dow Chemical Company
    Inventors: Juan M. Garces, Steven R. Lakso