Patents by Inventor Dongchan Ahn

Dongchan Ahn 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).

  • Publication number: 20220213273
    Abstract: A polyorganosiloxanes has an anhydride functionality and an aromatic functionality, wherein a carbon of the aromatic functionality is separated from a carbon of a carbonyl group of the anhydride functionality by a carbon chain, wherein the polyorganosiloxane contains 5 weight-percent or more silicon atoms based on weight of the polyorganosiloxane.
    Type: Application
    Filed: August 3, 2020
    Publication date: July 7, 2022
    Inventors: Dongchan Ahn, Zachary S. Kean, Thomas H. Peterson
  • Patent number: 11148121
    Abstract: A method and apparatus for removing a volatile component from a mixture are disclosed. The method and apparatus employ a crosslinked elastomer with a glass transition temperature ?+25° C. as the sorbent.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: October 19, 2021
    Assignee: Dow Silicones Corporation
    Inventors: Dongchan Ahn, Aaron Greiner, James Thompson
  • Publication number: 20200156043
    Abstract: A method and apparatus for removing an organosilicon component from a mixture are disclosed. The method and apparatus employ a copolymer of a di-alkenyl functional aromatic hydrocarbon and a polyorganosiloxane as the sorbent.
    Type: Application
    Filed: February 28, 2018
    Publication date: May 21, 2020
    Inventors: Dongchan Ahn, Aaron J. Greiner, Robert Huber, James F. Thompson
  • Patent number: 10537853
    Abstract: Various embodiments disclosed relate to methods of separating volatile compounds from a liquid feed mixture comprising an emulsion. In various embodiments, the method includes contacting a first side of a first membrane with a liquid feed mixture including an emulsion having a polymer, and at least one volatile compound. The method can also include contacting a second side of the first membrane with a sweep medium including at least one a sweep fluid to produce a permeate mixture on the second side of the first membrane and a retentate mixture on the first side of the first membrane, wherein the permeate mixture is enriched in the volatile compound, and the retentate mixture is depleted in the volatile compound.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: January 21, 2020
    Assignee: Dow Silicones Corporation
    Inventors: Dongchan Ahn, Aaron Greiner, Mark Keinath, James Thompson
  • Patent number: 10456738
    Abstract: The present invention relates to methods of separating one or more components from a feed composition, methods of desorbing one or more components from an absorbent fluid, as well as systems and apparatus that can carry out the methods. In one embodiment, the present invention provides a method of separating one or more components from a feed composition including contacting at least some of a first component of a feed composition including the first component with an absorbent fluid, to provide a contacted composition and a used absorbent fluid including at least some of the first component contacted with the absorbent fluid. In some embodiments the absorbent fluid can be an organosilicon fluid including an organosilicon including at least one of a hydroxy group, an ether group, an acrylate group, a methacrylate group, an acrylamide group, a methacrylamide group, and a polyether group.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: October 29, 2019
    Assignee: Dow Silicones Corporation
    Inventors: Dongchan Ahn, Aaron J. Greiner, James S. Hrabal, Alexandra N. Lichtor
  • Publication number: 20190076820
    Abstract: A method and apparatus for removing a volatile component from a mixture are disclosed. The method and apparatus employ a crosslinked elastomer with a glass transition temperature ?+25° C. as the sorbent.
    Type: Application
    Filed: April 17, 2017
    Publication date: March 14, 2019
    Inventors: Dongchan Ahn, Aaron Greiner, James Thompson`
  • Patent number: 10035881
    Abstract: Various embodiments disclosed relate to method of forming organosilicon products. In various embodiments, the present invention provides a method of forming an organosilicon product that can include contacting a first side of a silicone membrane with a nonvolatile liquid reactant. The method can include contacting a second side of the membrane with a gaseous reactant. The contacting can be sufficient to react the gaseous reactant with the liquid reactant to form an organosilicon product on the first side of the silicone membrane. The silicone membrane can be substantially impermeable to the liquid reactant and substantially permeable to the gaseous reactant.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: July 31, 2018
    Assignee: DOW SILICONES CORPORATION
    Inventors: Dongchan Ahn, Paul C. Dinh, Michael S. Ferritto, Don L. Kleyer, James F. Thompson
  • Publication number: 20180200675
    Abstract: Various embodiments disclosed relate to methods of separating volatile compounds from a liquid feed mixture comprising an emulsion. In various embodiments, the method includes contacting a first side of a first membrane with a liquid feed mixture including an emulsion having a polymer, and at least one volatile compound. The method can also include contacting a second side of the first membrane with a sweep medium including at least one a sweep fluid to produce a permeate mixture on the second side of the first membrane and a retentate mixture on the first side of the first membrane, wherein the permeate mixture is enriched in the volatile compound, and the retentate mixture is depleted in the volatile compound.
    Type: Application
    Filed: September 23, 2016
    Publication date: July 19, 2018
    Inventors: Dongchan Ahn, Aaron Greiner, Mark Keinath, James Thompson
  • Patent number: 9962657
    Abstract: Various embodiments disclosed relate to methods of separating a volatile siloxane from a liquid mixture. In various embodiments, the method includes contacting a first side of a first hydrophobic membrane with a liquid feed mixture including a polymer and at least one volatile siloxane. The method can also include contacting a second side of the membrane with a sweep medium including at least one of a sweep gas, a sweep liquid, and a vacuum, to produce a permeate mixture on the second side of the membrane and a retentate mixture on the first side of the membrane, wherein the permeate mixture is enriched in the volatile siloxane, and the retentate mixture is depleted in the volatile siloxane.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: May 8, 2018
    Assignee: DOW CORNING CORPORATION
    Inventors: Dongchan Ahn, James Thompson
  • Patent number: 9957364
    Abstract: Various embodiments disclosed related to modified elastomer surfaces and methods of making and using the same. In various embodiments, the present invention provides a method of modifying the surface of an elastomer. The method can include contacting a polymerizable composition and at least part of a surface of an elastomer. The polymerizable composition can include a free-radical polymerizable monomers, an organoborane-organonitrogen free-radical initiator, and an amine-reactive compound. The method can include at least partially polymerizing the polymerizable composition, to provide a polymerization product of the polymerizable composition on the surface of the elastomer.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: May 1, 2018
    Assignee: DOW CORNING CORPORATION
    Inventors: Dongchan Ahn, James S Hrabal, Christopher L Wong
  • Publication number: 20180078894
    Abstract: The present invention relates to methods of separating one or more components from a feed composition, methods of desorbing one or more components from an absorbent fluid, as well as systems and apparatus that can carry out the methods. In one embodiment, the present invention provides a method of separating one or more components from a feed composition including contacting at least some of a first component of a feed composition including the first component with an absorbent fluid, to provide a contacted composition and a used absorbent fluid including at least some of the first component contacted with the absorbent fluid. In some embodiments the absorbent fluid can be an organosilicon fluid including an organosilicon including at least one of a hydroxy group, an ether group, an acrylate group, a methacrylate group, an acrylamide group, a methacrylamide group, and a polyether group.
    Type: Application
    Filed: November 1, 2017
    Publication date: March 22, 2018
    Inventors: Dongchan Ahn, Aaron J. Greiner, James S. Hrabal, Alexandra N. Lichtor
  • Patent number: 9833737
    Abstract: The present invention relates to methods of separating one or more components from a feed composition, methods of desorbing one or more components from an absorbent fluid, as well as systems and apparatus that can carry out the methods. In one embodiment, the present invention provides a method of separating one or more components from a feed composition including contacting at least some of a first component of a feed composition including the first component with an absorbent fluid, to provide a contacted composition and a used absorbent fluid including at least some of the first component contacted with the absorbent fluid. In some embodiments the absorbent fluid can be an organosilicon fluid including an organosilicon including at least one of a hydroxy group, an ether group, an acrylate group, a methacrylate group, an acrylamide group, a methacrylamide group, and a polyether group.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: December 5, 2017
    Assignee: Dow Corning Corporation
    Inventors: Dongchan Ahn, Aaron J. Greiner, James S. Hrabal, Alexandra N. Lichtor
  • Patent number: 9731245
    Abstract: The present invention relates to a method of removing a gas from a mixture. The method includes contacting a silicone membrane with a feed mixture including at least a first gas component and contacting a second side of the membrane with an organosilicon sweep liquid, producing a retentate mixture depleted in the first gas component and an organosilicon sweep liquid enriched in the first gas component. The invention also provides methods of removing a gas from a liquid, and methods of regenerating and recycling an organosilicon sweep liquid.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: August 15, 2017
    Assignee: Dow Corning Corporation
    Inventors: Dongchan Ahn, Aaron Greiner, James Hrabal, Alexandra Lichtor
  • Publication number: 20170210849
    Abstract: Various embodiments disclosed relate to method of forming organosilicon products. In various embodiments, the present invention provides a method of forming an organosilicon product that can include contacting a first side of a silicone membrane with a nonvolatile liquid reactant. The method can include contacting a second side of the membrane with a gaseous reactant. The contacting can be sufficient to react the gaseous reactant with the liquid reactant to form an organosilicon product on the first side of the silicone membrane. The silicone membrane can be substantially impermeable to the liquid reactant and substantially permeable to the gaseous reactant.
    Type: Application
    Filed: June 9, 2015
    Publication date: July 27, 2017
    Applicant: Dow Corning Corporation
    Inventors: DONGCHAN AHN, PAUL C. DINH, MICHAEL S. FERRITTO, DON L. KLEYER, JAMES F. THOMPSON
  • Patent number: 9624334
    Abstract: In various embodiments, provided are hydrophilically-modified silicone compositions comprising substantially spherical elastomeric microparticles, methods of making such compositions, and silicone pastes, personal care, and healthcare products comprising such silicone compositions.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: April 18, 2017
    Assignee: Dow Corning Corporation
    Inventors: Dongchan Ahn, Qi Huang, Maria M. Puscau, William Schulz, James Thompson, Kevin Wier
  • Patent number: 9574109
    Abstract: Provided in various embodiments are surface-modified hydrogels and hydrogel microparticles, methods for their preparation, and uses thereof for delivery of personal care and healthcare active ingredients, and agricultural active ingredients. In some embodiments, such hydrogels and hydrogel microparticles comprise surface coatings that are resistant to solvent washing and can act as barriers for the migration of water and/or water-compatible alcohols and actives soluble therein.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: February 21, 2017
    Assignee: Dow Corning Corporation
    Inventors: Dongchan Ahn, James Thompson
  • Publication number: 20170021307
    Abstract: Various embodiments disclosed relate to methods of separating a volatile siloxane from a liquid mixture. In various embodiments, the method includes contacting a first side of a first hydrophobic membrane with a liquid feed mixture including a polymer and at least one volatile siloxane. The method can also include contacting a second side of the membrane with a sweep medium including at least one of a sweep gas, a sweep liquid, and a vacuum, to produce a permeate mixture on the second side of the membrane and a retentate mixture on the first side of the membrane, wherein the permeate mixture is enriched in the volatile siloxane, and the retentate mixture is depleted in the volatile siloxane.
    Type: Application
    Filed: December 5, 2014
    Publication date: January 26, 2017
    Inventors: Dongchan Ahn, James Thompson
  • Publication number: 20170002159
    Abstract: Various embodiments disclosed related to modified elastomer surfaces and methods of making and using the same. In various embodiments, the present invention provides a method of modifying the surface of an elastomer. The method can include contacting a polymerizable composition and at least part of a surface of an elastomer. The polymerizable composition can include a free-radical polymerizable monomers, an organoborane-organonitrogen free-radical initiator, and an amine-reactive compound. The method can include at least partially polymerizing the polymerizable composition, to provide a polymerization product of the polymerizable composition on the surface of the elastomer.
    Type: Application
    Filed: December 11, 2014
    Publication date: January 5, 2017
    Inventors: Dongchan Ahn, James S Hrabal, Chirstopher L Wongg
  • Publication number: 20160023159
    Abstract: The present invention relates to methods of separating one or more components from a feed composition, methods of desorbing one or more components from an absorbent fluid, as well as systems and apparatus that can carry out the methods. In one embodiment, the present invention provides a method of separating one or more components from a feed composition including contacting at least some of a first component of a feed composition including the first component with an absorbent fluid, to provide a contacted composition and a used absorbent fluid including at least some of the first component contacted with the absorbent fluid. In some embodiments the absorbent fluid can be an organosilicon fluid including an organosilicon including at least one of a hydroxy group, an ether group, an acrylate group, a methacrylate group, an acrylamide group, a methacrylamide group, and a polyether group.
    Type: Application
    Filed: September 25, 2013
    Publication date: January 28, 2016
    Inventors: Dongchan Ahn, Aaron J. Greiner, James S. Harabal, Alexandra N. Lichtor, James F. Thompson
  • Publication number: 20160023158
    Abstract: The present invention relates to methods of separating one or more components from a feed composition, methods of desorbing one or more components from an absorbent fluid, as well as systems and apparatus that can carry out the methods. In one embodiment, the present invention provides a method of separating one or more components from a feed composition including contacting at least some of a first component of a feed composition including the first component with an absorbent fluid, to provide a contacted composition and a used absorbent fluid including at least some of the first component contacted with the absorbent fluid. In some embodiments the absorbent fluid can be an organosilicon fluid including an organosilicon including at least one of a hydroxy group, an ether group, an acrylate group, a methacrylate group, an acrylamide group, a methacrylamide group, and a polyether group.
    Type: Application
    Filed: October 2, 2015
    Publication date: January 28, 2016
    Inventors: Dongchan Ahn, Aaron J. Greiner, James S. Hrabal, Alexandra N. Lichtor