Patents by Inventor Dirk B. Zinkweg

Dirk B. Zinkweg 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: 9793027
    Abstract: A dielectric fluid composition for electrical apparatus comprises a functionalized 12-hydroxy stearic acid having desirable properties including a pour point less than ?30° C. and a fire point greater than 250° C. It may be prepared by a process wherein 12-hydroxy methyl stearate is transesterified by reaction with a C3-C20 alcohol to form an alkyl-12-hydroxy stearate, followed by esterification thereof with a linear or branched C4-C20 carboxylic acid. This acid may be a free acid chloride, a fatty acid, a carboxylic acid anhydride, or combination thereof. The resulting functionalized 12-hydroxy stearic acid exhibits improved thermoxidative capability, low temperature flowability, and increased fire point.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: October 17, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Suh Joon Han, Dirk B. Zinkweg, Zenon Lysenko
  • Publication number: 20160260517
    Abstract: A dielectric fluid composition for electrical apparatus comprises a functionalized 12-hydroxy stearic acid having desirable properties including a pour point less than ?30° C. and a fire point greater than 250° C. It may be prepared by a process wherein 12-hydroxy methyl stearate is transesterified by reaction with a C3-C20 alcohol to form an alkyl-12-hydroxy stearate, followed by esterification thereof with a linear or branched C4-C20 carboxylic acid. This acid may be a free acid chloride, a fatty acid, a carboxylic acid anhydride, or combination thereof. The resulting functionalized 12-hydroxy stearic acid exhibits improved thermoxidative capability, low temperature flowability, and increased fire point.
    Type: Application
    Filed: May 17, 2016
    Publication date: September 8, 2016
    Inventors: Suh Joon Han, Dirk B. Zinkweg, Zenon Lysenko
  • Patent number: 9416089
    Abstract: A dielectric fluid composition for electrical apparatus comprises a functionalized 12-hydroxy stearic acid having desirable properties including a pour point less than ?30° C. and a fire point greater than 250° C. It may be prepared by a process wherein 12-hydroxy methyl stearate is transesterified by reaction with a C3-C20 alcohol to form an alkyl-12-hydroxy stearate, followed by esterification thereof with a linear or branched C4-C20 carboxylic acid. This acid may be a free acid chloride, a fatty acid, a carboxylic acid anhydride, or combination thereof. The resulting functionalized 12-hydroxy stearic acid exhibits improved thermoxidative capability, low temperature flowability, and increased fire point.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: August 16, 2016
    Assignee: Dow Global Technologies LLC
    Inventors: Suh Joon Han, Dirk B. Zinkweg, Zenon Lysenko
  • Patent number: 9330810
    Abstract: A dielectric fluid composition for electrical apparatus comprises a functionalized methyl-12-carboxy methyl stearate having desirable properties including a pour point less than ?30° C. and a fire point greater than 250° C. It may be prepared by a process wherein methyl-12-hydroxy methyl stearate is transesterified by reaction with a C3-C20 alcohol to form the hydroxy methyl ester, followed by reaction with a linear or branched C4-C20 carboxylic acid selected from free acid chlorides, fatty acids, carboxylic acid anhydrides, and combinations thereof. The second step serves to end-cap the hydroxyl groups, thereby producing the functionalized methyl-12-carboxy methyl stearate compound that exhibits improved thermoxidative stability and low temperature flowability, as well as increased fire point.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: May 3, 2016
    Assignee: Dow Global Technologies LLC
    Inventors: Suh Joon Han, Dirk B. Zinkweg, Zenon Lysenko
  • Patent number: 9228155
    Abstract: Plasticizers are made from oil with a narrowed, fatty acid polydispersity and extracted from a microorganism, such as a natural or genetically modified bacterium or algae. These plasticizers can comprise either a large content of either saturated C4 and/or C6 triglycerides or unsaturated C12 or greater triglycerides that have been chemically modified by one or more of epoxidation, acylation and esterification. The plasticizers of this invention are particularly well-suited for use with polar polymeric resins such as PVC.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: January 5, 2016
    Assignee: Dow Global Technologies LLC
    Inventors: Brian R. Maurer, Robert F. Eaton, Dirk B. Zinkweg, Suh Joon Han
  • Patent number: 9103966
    Abstract: Plastic optical fibers or plastic optical fiber cores with good high temperature resistance to optical attenuation loss are prepared from a cyclic block copolymer characterized by a: A. Weight ratio of hydrogenated conjugated diene polymer block to hydrogenated vinyl aromatic polymer block of 35:65 to 10:90; B. Number average molecular weight (Mn) of from 40,000 to 150,000, grams per mole (g/mol); and C. Hydrogenation level such that each hydrogenated vinyl aromatic polymer block and each hydrogenated conjugated diene polymer block has a hydrogenation level of at least 95 percent.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: August 11, 2015
    Assignee: Dow Global Technologies LLC
    Inventors: Thomas S. Lin, Anny Flory, Dirk B. Zinkweg, Jeffrey M. Cogen, Mary Anne Leugers, Weijun Zhou
  • Publication number: 20140346414
    Abstract: A dielectric fluid composition for electrical apparatus comprises a functionalized 12-hydroxy stearic acid having desirable properties including a pour point less than ?30° C. and a fire point greater than 250° C. It may be prepared by a process wherein 12-hydroxy methyl stearate is transesterified by reaction with a C3-C20 alcohol to form an alkyl-12-hydroxy stearate, followed by esterification thereof with a linear or branched C4-C20 carboxylic acid. This acid may be a free acid chloride, a fatty acid, a carboxylic acid anhydride, or combination thereof. The resulting functionalized 12-hydroxy stearic acid exhibits improved thermoxidative capability, low temperature flowability, and increased fire point.
    Type: Application
    Filed: September 26, 2012
    Publication date: November 27, 2014
    Applicant: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Suh Joon Han, Dirk B. Zinkweg, Zenon Lysenko
  • Publication number: 20140252281
    Abstract: A dielectric fluid composition for electrical apparatus comprises a functionalized methyl-12-carboxy methyl stearate having desirable properties including a pour point less than ?30° C. and a fire point greater than 250° C. It may be prepared by a process wherein methyl-12-hydroxy methyl stearate is transesterified by reaction with a C3-C20 alcohol to form the hydroxy methyl ester, followed by reaction with a linear or branched C4-C20 carboxylic acid selected from free acid chlorides, fatty acids, carboxylic acid anhydrides, and combinations thereof. The second step serves to end-cap the hydroxyl groups, thereby producing the functionalized methyl-12-carboxy methyl stearate compound that exhibits improved thermoxidative stability and low temperature flowability, as well as increased fire point.
    Type: Application
    Filed: September 26, 2012
    Publication date: September 11, 2014
    Applicant: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Suh Joon Han, Dirk B. Zinkweg, Zenon Lysenko
  • Patent number: 8580160
    Abstract: The disclosure is directed to a dielectric fluid. The dielectric fluid includes an algae oil. The algae oil includes a natural algae antioxidant. The natural algae antioxidant is selected from ?-carotene, astaxanthin, tocopherol, polyunsaturated triglycerides, and combinations thereof.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: November 12, 2013
    Assignee: Dow Global Technologies LLC
    Inventors: Suh Joon Han, Dirk B. Zinkweg, Jeffrey M. Cogen, Steve Gluck
  • Publication number: 20130123408
    Abstract: Plasticizers are made from oil with a narrowed, fatty acid polydispersity and extracted from a microorganism, such as a natural or genetically modified bacterium or algae. These plasticizers can comprise either a large content of either saturated C4 and/or C6 triglycerides or unsaturated C12 or greater triglycerides that have been chemically modified by one or more of epoxidation, acylation and esterification. The plasticizers of this invention are particularly well-suited for use with polar polymeric resins such as PVC.
    Type: Application
    Filed: July 28, 2011
    Publication date: May 16, 2013
    Inventors: Brian R. Maurer, Robert F. Eaton, Dirk B. Zinkweg, Suh Joon Han
  • Publication number: 20120243842
    Abstract: Plastic optical fibers or plastic optical fiber cores with good high temperature resistance to optical attenuation loss are prepared from a cyclic block copolymer characterized by a: A. Weight ratio of hydrogenated conjugated diene polymer block to hydrogenated vinyl aromatic polymer block of 35:65 to 10:90; B. Number average molecular weight (Mn) of from 40,000 to 150,000, grams per mole (g/mol); and C. Hydrogenation level such that each hydrogenated vinyl aromatic polymer block and each hydrogenated conjugated diene polymer block has a hydrogenation level of at least 95 percent.
    Type: Application
    Filed: November 3, 2010
    Publication date: September 27, 2012
    Inventors: Thomas S. Lin, Anny Flory, Dirk B. Zinkweg, Jeffrey M. Cogen, Mary Anne Leugers, Weijun Zhou
  • Publication number: 20110188202
    Abstract: The disclosure is directed to a dielectric fluid. The dielectric fluid includes an algae oil. The algae oil includes a natural algae antioxidant. The natural algae antioxidant is selected from ?-carotene, astaxanthin, tocopherol, polyunsaturated triglycerides, and combinations thereof.
    Type: Application
    Filed: December 23, 2010
    Publication date: August 4, 2011
    Inventors: Suh Joon Han, Dirk B. Zinkweg, Jeffrey M. Cogen, Steve Gluck
  • Publication number: 20110100677
    Abstract: The present invention is a fiber-polymer composite-supported conductor with a fiber-polymer composite core and a tubular metal conductor. The tubular metal conductor is on the core. Substantially all mechanical tension resulting from the disposition of the conductor is borne by the fiber-polymer composite core.
    Type: Application
    Filed: June 30, 2009
    Publication date: May 5, 2011
    Applicant: Dow Global Technologies Inc.
    Inventors: Buo Chen, Dirk B. Zinkweg