Patents by Inventor Stephen T. Cohn

Stephen T. Cohn 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: 20240218263
    Abstract: A process for producing mesophase pitch, the process including: providing a feedstock having a T5?400° F. (204° C.) and a T95?1,400° F. (760° C.); heating the feedstock at a temperature of at least 450° C. to produce a heat treated product including mesophase pitch, wherein the heating is conducted under reaction conditions sufficient to have an equivalent reaction time greater than or equal to 1,000 seconds; and recovering the mesophase pitch.
    Type: Application
    Filed: April 6, 2022
    Publication date: July 4, 2024
    Inventors: Yifei Liu, Teng Xu, Stephen T. Cohn, Jeffrey C. Yeh
  • Publication number: 20240209266
    Abstract: A process for producing mesophase pitch, the process including: contacting an isotropic pitch with a solvent under conditions sufficient to produce a solvent fraction comprising the solvent and an insoluble fraction comprising mesophase pitch; and recovering the mesophase pitch, wherein the contacting includes the solvent having a Solubility Blending number (SBN) that causes the mesophase pitch to have a softening point ranging from 270° C. to 350° C., as measured in accordance with ASTM D3104-14.
    Type: Application
    Filed: April 20, 2022
    Publication date: June 27, 2024
    Inventors: Yifei Liu, Teng Xu, Stephen T. Cohn, Jeffrey C. Yeh
  • Patent number: 11926605
    Abstract: A 5,5?-Di-(protected)-2,2?-bifuran: wherein each R1 is independently an unsubstituted or substituted 5- or 6-member 1,3-dioxo-2-yl ring radical. Processes for making the bifuran include coupling 2-(protected)-furfural. Processes for using the bifuran include deprotection, functionalization, and/or polymerization to form a polyester. The polyester can be a renewable, high-performing polyester offering a combination of low cost of production, high sustainability, and excellent performance.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: March 12, 2024
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Kapil Kandel, Stephen T. Cohn, Michael Salciccioli, Crisita Carmen H. Atienza, Alan A. Galuska
  • Publication number: 20240059976
    Abstract: Processes are described for producing mesophase pitch. The processes generally comprise providing a feedstock having a T5 ?400° F. (204° C.) and a T95 ?1,400° F. (760° C.) and heating the feedstock at a temperature ranging from about 420° C. to about 520° C. to produce a heat treated product including isotropic pitch. Generally, the heating is conducted under conditions sufficient to satisfy the relationship [X*Y]?20,000 seconds, wherein X is the equivalent reaction time of the heating, and wherein Y is the bromine number of the feedstock as measured in accordance with ASTM D1159. The processes generally further comprise contacting the isotropic pitch with a solvent having a Solubility Blending number (SBN) of at least about 10 SU under conditions sufficient to produce a solvent fraction comprising the solvent and an insoluble fraction comprising mesophase pitch, and recovering the mesophase pitch.
    Type: Application
    Filed: January 4, 2022
    Publication date: February 22, 2024
    Inventors: Yifei Liu, Stephen T. Cohn, Jeffrey C. Yeh, Teng Xu
  • Publication number: 20210009545
    Abstract: A 5,5?-Di-(protected)-2,2?-bifuran: wherein each R1 is independently an unsubstituted or substituted 5- or 6-member 1,3-dioxo-2-yl ring radical. Processes for making the bifuran include coupling 2-(protected)-furfural. Processes for using the bifuran include deprotection, functionalization, and/or polymerization to form a polyester.
    Type: Application
    Filed: February 11, 2019
    Publication date: January 14, 2021
    Inventors: Kapil Kandel, Stephen T. Cohn, Michael Salciccioli, Crisita Carmen H. Atienza, Alan A. Galuska
  • Patent number: 10738259
    Abstract: This disclosure relates to naphthalene-1,8-dicarboxylate ester compounds, lubricating oil base stocks comprising naphthalene-1,8-dicarboxylate ester compounds, lubricating oil compositions comprising such base stocks, and method of making such base stocks. The lubricating oil base stocks comprising naphthalene-1,8-dicarboxylate ester compounds exhibit desirable lubricating properties such as polarity.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: August 11, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Abhimanyu O. Patil, Hong Cheng, Stephen T. Cohn, James R. Lattner
  • Patent number: 10570084
    Abstract: A diester of a fused ring compound of the formula (I): wherein: the fused rings are both aromatic; R1 and R4 to R6 substituents are H or ester moieties having C1 to C20 linear or branched alkyl chains; R2 and R3 are —C(O)OCxHy, wherein x is from 10 to 12 and y is from 21 to 25; two adjacent R1 to R4 substituents are —C(O)OCxHy, wherein x is from 10 to 12 and y is from 21 to 25; and when R3 and R4 are ester moieties, the alkyl chains of R4 are not C5 or C8; and polymer compositions containing the fused ring compound.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: February 25, 2020
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Stephen T. Cohn, Christopher M. Evans, Christine A. Costello, James R. Lattner
  • Patent number: 10344222
    Abstract: A hydrocarbon conversion process comprises providing a hydrocarbon feedstock comprising an effluent fraction from a pyrolysis process, wherein the effluent fraction has an initial boiling point at atmospheric pressure of at least 177° C. and a final boiling point at atmospheric pressure of no more than 343° C. and comprises at least 0.5 wt. % of olefinic hydrogen atoms based on the total weight of hydrogen atoms in the effluent fraction. The hydrocarbon feedstock is hydroprocessed in at least one hydroprocessing zone in the presence of treatment gas comprising molecular hydrogen under catalytic hydroprocessing conditions to produce a hydroprocessed product comprising less than 0.5 wt. % of olefinic hydrogen atoms based on the total weight of hydrogen atoms in the hydroprocessed product. The hydroprocessing conditions comprise a temperature from 150 to 350° C. and a pressure from 500 to 1500 psig (3550 to 10445 kPa-a).
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: July 9, 2019
    Assignee: ExonMobil Chemical Patents Inc.
    Inventors: Gaurav Agrawal, Stephen T. Cohn, Kapil Kandel, Subramanya V. Nayak, Teng Xu
  • Publication number: 20190048280
    Abstract: This disclosure relates to naphthalene-1,8-dicarboxylate ester compounds, lubricating oil base stocks comprising naphthalene-1,8-dicarboxylate ester compounds, lubricating oil compositions comprising such base stocks, and method of making such base stocks. The lubricating oil base stocks comprising naphthalene-1,8-dicarboxylate ester compounds exhibit desirable lubricating properties such as polarity.
    Type: Application
    Filed: June 20, 2018
    Publication date: February 14, 2019
    Inventors: Abhimanyu O. Patil, Hong Cheng, Stephen T. Cohn, James R. Lattner
  • Publication number: 20180334622
    Abstract: A hydrocarbon conversion process comprises providing a hydrocarbon feedstock comprising an effluent fraction from a pyrolysis process, wherein the effluent fraction has an initial boiling point at atmospheric pressure of at least 177° C. and a final boiling point at atmospheric pressure of no more than 343° C. and comprises at least 0.5 wt. % of olefinic hydrogen atoms based on the total weight of hydrogen atoms in the effluent fraction. The hydrocarbon feedstock is hydroprocessed in at least one hydroprocessing zone in the presence of treatment gas comprising molecular hydrogen under catalytic hydroprocessing conditions to produce a hydroprocessed product comprising less than 0.5 wt. % of olefinic hydrogen atoms based on the total weight of hydrogen atoms in the hydroprocessed product. The hydroprocessing conditions comprise a temperature from 150 to 350° C. and a pressure from 500 to 1500 psig (3550 to 10445 kPa-a).
    Type: Application
    Filed: May 4, 2018
    Publication date: November 22, 2018
    Inventors: Gaurav Agrawal, Stephen T. Cohn, Kapil Kandel, Subramanya V. Nayak, Teng Xu
  • Publication number: 20180118660
    Abstract: A diester of a fused ring compound of the formula (I): wherein the R1 to R6 substituents are H or ester moieties having C1 to C20 alkyl chains, but when both fused rings are aromatic and R3 and R4 are ester moieties, the alkyl chains are not C5 or C8, and polymer compositions containing the fused ring compound.
    Type: Application
    Filed: November 3, 2017
    Publication date: May 3, 2018
    Inventors: Stephen T. COHN, Christopher M. EVANS, Christine A. COSTELLO, James R. LATTNER
  • Publication number: 20180118917
    Abstract: Provided are compounds and processes of making and using such compounds of the formula: Wherein R=C4 to C15 linear or branched alkyls wherein R is a linear or branched alkyl residue of a C4 to C15 alcohol. Such compounds provide advantageous properties when used as plasticizers in polymer compositions.
    Type: Application
    Filed: November 3, 2017
    Publication date: May 3, 2018
    Inventors: Stephen T. COHN, Christopher M. EVANS, James R. LATTNER, Christine A. COSTELLO, Didier A. NAERT, Bernard F. LEROY
  • Patent number: 9517999
    Abstract: A process for producing a grade of (meth)acrylic acid having residual formaldehyde levels of under 100 parts per million.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: December 13, 2016
    Assignee: Rohm and Haas Company
    Inventors: Alan E. Sopchik, Stephen T. Cohn
  • Publication number: 20150368177
    Abstract: A process for producing a grade of (meth)acrylic acid having residual formaldehyde levels of under 100 parts per Million.
    Type: Application
    Filed: March 7, 2014
    Publication date: December 24, 2015
    Inventors: Alan E. Sopchik, Stephen T. Cohn
  • Patent number: 6723747
    Abstract: This invention provides estrogen receptor modulators of formula I, having the structure wherein R1, R2, R3, R4 R5, R6, and R7 are as defined in the specification, or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: April 20, 2004
    Assignee: Wyeth
    Inventors: Richard E. Mewshaw, Richard J. Edsall, Stephen T. Cohn, Heather A. Harris, James C. Keith, Jr., Leo M. Albert
  • Publication number: 20030176491
    Abstract: This invention provides estrogen receptor modulators of formula I, having the structure 1
    Type: Application
    Filed: December 11, 2002
    Publication date: September 18, 2003
    Applicant: Wyeth
    Inventors: Richard E. Mewshaw, Richard J. Edsall, Stephen T. Cohn, Heather A. Harris, James C. Keith, Leo M. Albert