Patents by Inventor Leslie Sharon Depew

Leslie Sharon Depew 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: 11827595
    Abstract: A process for direct esterification of an alkyl aldehyde with an alkyl alcohol to produce an alkyl ester is disclosed. The process comprises reacting an alkyl aldehyde with an alkyl alcohol in the presence of an Au/TiOa catalyst, a base and an enal or oxygen to form an ester and an aldehyde. The process avoids liberation of water and avoids the step of oxidation of the alkyl aldehyde to an alkyl acid.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: November 28, 2023
    Assignee: Eastman Chemical Company
    Inventors: William Christopher Ketchie, Sumit Chakraborty, Leslie Sharon Depew
  • Publication number: 20220251020
    Abstract: A process for direct esterification of an alkyl aldehyde with an alkyl alcohol to produce an alkyl ester is disclosed. The process comprises reacting an alkyl aldehyde with an alkyl alcohol in the presence of an Au/TiOa catalyst, a base and an enal or oxygen to form an ester and an aldehyde. The process avoids liberation of water and avoids the step of oxidation of the alkyl aldehyde to an alkyl acid.
    Type: Application
    Filed: November 12, 2019
    Publication date: August 11, 2022
    Applicant: Eastman Chemical Company
    Inventors: William Christopher Ketchie, Sumit Chakraborty, Leslie Sharon Depew
  • Publication number: 20220169506
    Abstract: Methods for producing cyclododecasulfur are disclosed, that include the steps of: oxidizing a bromide in aqueous solution to produce a mixture of molecular bromine, tribromide, and bromide; reducing water to produce hydrogen and a hydroxide; and reacting a metallasulfur derivative with the molecular bromine, to produce cyclododecasulfur and a metallabromide derivative.
    Type: Application
    Filed: March 5, 2020
    Publication date: June 2, 2022
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: SCOTT DONALD BARNICKI, ROBERT THOMAS HEMBRE, SUMIT CHAKRABORTY, MICHAEL RICHARD LANINGHAM, VICKIE HAGOOD OSBORNE, LESLIE SHARON DEPEW, ANNETTE ELIZABETH STEVENS, JOHN DEREK WOOLLINS, GUOXIONG HUA
  • Publication number: 20220169505
    Abstract: Methods for producing cyclododecasulfur are disclosed that include the steps of: reacting a metallasulfur derivative with a molecular halogen to produce cyclododecasulfur and a metallahalide derivative; and reacting the metallahalide derivative with a sulfide or polysulfide to produce the metallasulfur derivative and a halide.
    Type: Application
    Filed: March 5, 2020
    Publication date: June 2, 2022
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: SCOTT DONALD BARNICKI, ROBERT THOMAS HEMBRE, SUMIT CHAKRABORTY, MICHAEL RICHARD LANINGHAM, VICKIE HAGOOD OSBORNE, LESLIE SHARON DEPEW, ANNETTE ELIZABETH STEVENS, JOHN DEREK WOOLLINS, GUOXIONG HUA
  • Publication number: 20220162068
    Abstract: Methods for producing cyclododecasulfur are disclosed that include the steps of: reacting a bromide with molecular chlorine to obtain molecular bromine and a chloride; oxidizing the chloride in aqueous solution with removal of electrons to obtain molecular chlorine; reducing water with electrons to obtain hydrogen and a hydroxide; and reacting a metallasulfur derivative with the molecular bromine, to produce cyclododecasulfur and a metallabromide derivative.
    Type: Application
    Filed: March 5, 2020
    Publication date: May 26, 2022
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: SCOTT DONALD BARNICKI, ROBERT THOMAS HEMBRE, SUMIT CHAKRABORTY, MICHAEL RICHARD LANINGHAM, VICKIE HAGOOD OSBORNE, LESLIE SHARON DEPEW, ANNETTE ELIZABETH STEVENS, JOHN DEREK WOOLLINS, GUOXIONG HUA
  • Publication number: 20220162761
    Abstract: Method for producing molecular halogen are disclosed, that include the steps of: oxidizing a halide to produce a mixture comprising one or more of a molecular halogen, a trihalide, and a halide; reducing a polysulfide comprising a higher rank polysulfide dianion to produce a lower rank polysulfide dianion; and recovering molecular halogen from the mixture comprising one or more of a molecular halogen, a trihalide, and a halide.
    Type: Application
    Filed: March 5, 2020
    Publication date: May 26, 2022
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: SCOTT DONALD BARNICKI, ROBERT THOMAS HEMBRE, SUMIT CHAKRABORTY, MICHAEL RICHARD LANINGHAM, VICKIE HAGOOD OSBORNE, LESLIE SHARON DEPEW, ANNETTE ELIZABETH STEVENS, JOHN DEREK WOOLLINS, GUOXIONG HUA
  • Patent number: 10590062
    Abstract: A process for making methyl esters in high yields is provided. The process comprises contacting aliphatic or aromatic aldehydes and methanol with an iron catalyst, to catalyze the dehydrogenative coupling between aliphatic or aromatic aldehydes and methanol. The reaction is highly selective (<99.9%) toward the formation of methyl esters over homoesters and alcohols and operates at temperatures of less than 100° C. for 2-8 hours.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: March 17, 2020
    Assignee: Eastman Chemical Company
    Inventors: Sumit Chakraborty, Steven J. Adams, Robert Thomas Hembre, Leslie Sharon Depew
  • Patent number: 10167628
    Abstract: A stable emulsion having a fluid medium; a phase change material (PCM) comprising a straight, branched and/or cyclic aliphatic moiety having from 3 to 18 carbon atoms, polymers, and copolymers having residues of the straight, branched and/or cyclic aliphatic moiety; and a modified cyclodextrin having at least one functional moiety capable of forming a stable emulsion with the PCM in the fluid medium. The invention further includes a modified paint or surface coating having from 10 to 99 weight % of a base coating and from 1 to 90 weight % of the stable emulsion admixed therein.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: January 1, 2019
    Assignee: Eastman Chemical Company
    Inventors: Meera Angayarkanni Sidheswaran, Pruthesh Hariharrao Vargantwar, Leslie Sharon Depew, Glen Dennis Shields, Jennifer Lynn Cogar
  • Publication number: 20170167133
    Abstract: A stable emulsion having a fluid medium; a phase change material (PCM) comprising a straight, branched and/or cyclic aliphatic moiety having from 3 to 18 carbon atoms, polymers, and copolymers having residues of the straight, branched and/or cyclic aliphatic moiety; and a modified cyclodextrin having at least one functional moiety capable of forming a stable emulsion with the PCM in the fluid medium. The invention further includes a modified paint or surface coating having from 10 to 99 weight % of a base coating and from 1 to 90 weight % of the stable emulsion admixed therein.
    Type: Application
    Filed: December 9, 2015
    Publication date: June 15, 2017
    Applicant: Eastman Chemical Company
    Inventors: Meera Angayarkanni Sidheswaran, Pruthesh Hariharrao Vargantwar, Leslie Sharon Depew, Glen Dennis Shields, Jennifer Lynn Cogar
  • Patent number: 5731456
    Abstract: This invention pertains to the preparation of vinyl acetate by contacting a mixture of hydrogen and ketene with a heterogeneous catalyst containing a transition metal to produce acetaldehyde, which is then reacted with ketene in the presence of an acid catalyst to produce vinyl acetate.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: March 24, 1998
    Assignee: Eastman Chemical Company
    Inventors: Gerald Charles Tustin, Joseph Robert Zoeller, Leslie Sharon Depew
  • Patent number: 5719315
    Abstract: This invention pertains to the preparation of vinyl acetate by contacting within a contact zone a mixture of ketene and acetaldehyde with an acid catalyst at about one bar pressure and between about 85.degree. and 200.degree. C. and removing the reaction products from the contact zone.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: February 17, 1998
    Assignee: Eastman Chemical Company
    Inventors: Gerald Charles Tustin, Joseph Robert Zoeller, Leslie Sharon Depew
  • Patent number: 5679870
    Abstract: Disclosed is a process for the preparation of acetaldehyde by the hydrogenation of ketene in the presence of a transition metal hydrogenation catalyst.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: October 21, 1997
    Assignee: Eastman Chemical Company
    Inventors: Gerald Charles Tustin, Leslie Sharon Depew