Patents by Inventor Ashfaq Shaikh

Ashfaq Shaikh 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: 11027219
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: June 8, 2021
    Assignee: Eastman Chemical Company
    Inventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
  • Publication number: 20190381421
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Application
    Filed: August 27, 2019
    Publication date: December 19, 2019
    Applicant: Eastman Chemical Company
    Inventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
  • Patent number: 10406454
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: September 10, 2019
    Assignee: Eastman Chemical Company
    Inventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
  • Patent number: 10241148
    Abstract: One embodiment of the present invention sets forth an integrated circuit that includes multiple input/output (I/O) pad groups. Each I/O pad group includes an on-chip star network, multiple I/O pads, multiple test multiplexers, a digital-to-analog converter (DAC), and a wide-range comparator. Each test multiplexer is configured to couple a different I/O pad to the on-chip star network. The DAC is configured to supply at least one of a source current, a sink current, and a first reference voltage to the on-chip star network. The wide-range comparator is configured to compare a voltage present on a first I/O pad included in the plurality of I/O pads with a second reference voltage. Advantageously, IO leakage and DC parametric testing may be performed on integrated circuits with high I/O pad counts using an ATE system with a significantly lower quantity of ATE test channels relative to prior approaches.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: March 26, 2019
    Assignee: NVIDIA CORPORATION
    Inventors: Ashfaq Shaikh, Wen-Hung Lo, Punit Kishore, Amit Sanghani, Krishna Rajan
  • Publication number: 20180304171
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Application
    Filed: June 27, 2018
    Publication date: October 25, 2018
    Applicant: Eastman Chemical Company
    Inventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
  • Patent number: 10010812
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: July 3, 2018
    Assignee: Eastman Chemical Company
    Inventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
  • Patent number: 9943834
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: April 17, 2018
    Assignee: EASTMAN CHEMICAL COMPANY
    Inventors: Mesfin Janka, Kenny Parker, Ashfaq Shaikh, Lee Partin
  • Patent number: 9849434
    Abstract: Methods and apparatus for introducing a gas into the reaction zone of a reactor. Such methods and apparatus can more evenly distribute the gas throughout the reaction zone. Spargers for introducing a gas into the reaction zone of a reactor can be employed in systems and methods for carrying out the liquid-phase oxidation of an oxidizable compound, such as para-xylene.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: December 26, 2017
    Assignee: Grupo Petrotemex, S.A. de C.V.
    Inventor: Ashfaq Shaikh
  • Publication number: 20170157530
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Application
    Filed: February 17, 2017
    Publication date: June 8, 2017
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: KENNY PARKER, MESFIN JANKA, ASHFAQ SHAIKH, LEE PARTIN
  • Patent number: 9604202
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: March 28, 2017
    Assignee: EASTMAN CHEMICAL COMPANY
    Inventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
  • Patent number: 9573120
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: February 21, 2017
    Assignee: EASTMAN CHEMICAL COMPANY
    Inventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
  • Publication number: 20170045575
    Abstract: One embodiment of the present invention sets forth an integrated circuit that includes multiple input/output (I/O) pad groups. Each I/O pad group includes an on-chip star network, multiple I/O pads, multiple test multiplexers, a digital-to-analog converter (DAC), and a wide-range comparator. Each test multiplexer is configured to couple a different I/O pad to the on-chip star network. The DAC is configured to supply at least one of a source current, a sink current, and a first reference voltage to the on-chip star network. The wide-range comparator is configured to compare a voltage present on a first I/O pad included in the plurality of I/O pads with a second reference voltage. Advantageously, IO leakage and DC parametric testing may be performed on integrated circuits with high I/O pad counts using an ATE system with a significantly lower quantity of ATE test channels relative to prior approaches.
    Type: Application
    Filed: August 11, 2015
    Publication date: February 16, 2017
    Inventors: Ashfaq SHAIKH, Wen-Hung LO, Punit KISHORE, Amit SANGHANI, Krishna RAJAN
  • Patent number: 9504994
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: November 29, 2016
    Assignee: EASTMAN CHEMICAL COMPANY
    Inventors: Mesfin Janka, Kenny Parker, Ashfaq Shaikh, Lee Partin
  • Patent number: 9428480
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: August 30, 2016
    Assignee: Eastman Chemical Company
    Inventors: Mesfin Janka, David Lange, Michael Morrow, Bradford Bowers, Kenny Parker, Ashfaq Shaikh, Lee Partin, Jason Jenkins, Paula Moody, Thomas Shanks, Charles Sumner
  • Patent number: 9199958
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: December 1, 2015
    Assignee: Eastman Chemical Company
    Inventors: Mesfin Ejerssa Janka, David Lange, Michael C. Morrow, Bradford Russell Bowers, Kenny Randolph Parker, Ashfaq Shaikh, Lee Reynolds Partin, Charles Sumner
  • Publication number: 20150322028
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Application
    Filed: June 27, 2014
    Publication date: November 12, 2015
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: Mesfin Janka, Kenny Parker, Ashfaq Shaikh, Lee Partin
  • Publication number: 20150321180
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Application
    Filed: June 27, 2014
    Publication date: November 12, 2015
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
  • Publication number: 20150321119
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Application
    Filed: June 27, 2014
    Publication date: November 12, 2015
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
  • Publication number: 20150322029
    Abstract: Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.
    Type: Application
    Filed: June 27, 2014
    Publication date: November 12, 2015
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: MESFIN JANKA, KENNY PARKER, ASHFAQ SHAIKH, LEE PARTIN
  • Patent number: 9169229
    Abstract: A process to produce a purified dimethyl-furan-2,5-dicarboxylate (DMFD) by feeding furan dicarboxylic acid and methanol to an esterification zone to generate a crude diester composition, and purifying the crude diester composition with a physical separation process followed by crystallization, solid liquid separation, and optionally drying to produce a purified DMFD composition. A portion of the stream generated by solid liquid separation can be dissolved and subjected to crystallization and solid liquid separation repeatedly. The process is useful to produce a purified DMFD composition having a low b*, at least 98 wt. % DAFD solids, and a low concentration of 5-(methoxycarbonyl)furan-2-carboxylic acid (MCFC) and methyl 5-formylfuran-2-carboxylate (MFFC).
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: October 27, 2015
    Assignee: Eastman Chemical Company
    Inventors: Kenny Randolph Parker, Ashfaq Shaikh, Lee Reynolds Parton, Mesfin Ejerssa Janka