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).
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Patent number: 11027219Abstract: 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: GrantFiled: August 27, 2019Date of Patent: June 8, 2021Assignee: Eastman Chemical CompanyInventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
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Publication number: 20190381421Abstract: 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: ApplicationFiled: August 27, 2019Publication date: December 19, 2019Applicant: Eastman Chemical CompanyInventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
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Patent number: 10406454Abstract: 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: GrantFiled: June 27, 2018Date of Patent: September 10, 2019Assignee: Eastman Chemical CompanyInventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
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Patent number: 10241148Abstract: 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: GrantFiled: August 11, 2015Date of Patent: March 26, 2019Assignee: NVIDIA CORPORATIONInventors: Ashfaq Shaikh, Wen-Hung Lo, Punit Kishore, Amit Sanghani, Krishna Rajan
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Publication number: 20180304171Abstract: 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: ApplicationFiled: June 27, 2018Publication date: October 25, 2018Applicant: Eastman Chemical CompanyInventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
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Patent number: 10010812Abstract: 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: GrantFiled: February 17, 2017Date of Patent: July 3, 2018Assignee: Eastman Chemical CompanyInventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
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Patent number: 9943834Abstract: 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: GrantFiled: June 27, 2014Date of Patent: April 17, 2018Assignee: EASTMAN CHEMICAL COMPANYInventors: Mesfin Janka, Kenny Parker, Ashfaq Shaikh, Lee Partin
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Patent number: 9849434Abstract: 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: GrantFiled: September 22, 2010Date of Patent: December 26, 2017Assignee: Grupo Petrotemex, S.A. de C.V.Inventor: Ashfaq Shaikh
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Publication number: 20170157530Abstract: 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: ApplicationFiled: February 17, 2017Publication date: June 8, 2017Applicant: EASTMAN CHEMICAL COMPANYInventors: KENNY PARKER, MESFIN JANKA, ASHFAQ SHAIKH, LEE PARTIN
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Patent number: 9604202Abstract: 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: GrantFiled: June 27, 2014Date of Patent: March 28, 2017Assignee: EASTMAN CHEMICAL COMPANYInventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
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Patent number: 9573120Abstract: 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: GrantFiled: June 27, 2014Date of Patent: February 21, 2017Assignee: EASTMAN CHEMICAL COMPANYInventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
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Publication number: 20170045575Abstract: 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: ApplicationFiled: August 11, 2015Publication date: February 16, 2017Inventors: Ashfaq SHAIKH, Wen-Hung LO, Punit KISHORE, Amit SANGHANI, Krishna RAJAN
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Patent number: 9504994Abstract: 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: GrantFiled: June 27, 2014Date of Patent: November 29, 2016Assignee: EASTMAN CHEMICAL COMPANYInventors: Mesfin Janka, Kenny Parker, Ashfaq Shaikh, Lee Partin
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Patent number: 9428480Abstract: 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: GrantFiled: September 24, 2014Date of Patent: August 30, 2016Assignee: Eastman Chemical CompanyInventors: Mesfin Janka, David Lange, Michael Morrow, Bradford Bowers, Kenny Parker, Ashfaq Shaikh, Lee Partin, Jason Jenkins, Paula Moody, Thomas Shanks, Charles Sumner
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Patent number: 9199958Abstract: 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: GrantFiled: October 28, 2014Date of Patent: December 1, 2015Assignee: Eastman Chemical CompanyInventors: Mesfin Ejerssa Janka, David Lange, Michael C. Morrow, Bradford Russell Bowers, Kenny Randolph Parker, Ashfaq Shaikh, Lee Reynolds Partin, Charles Sumner
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Publication number: 20150322028Abstract: 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: ApplicationFiled: June 27, 2014Publication date: November 12, 2015Applicant: EASTMAN CHEMICAL COMPANYInventors: Mesfin Janka, Kenny Parker, Ashfaq Shaikh, Lee Partin
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Publication number: 20150321180Abstract: 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: ApplicationFiled: June 27, 2014Publication date: November 12, 2015Applicant: EASTMAN CHEMICAL COMPANYInventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
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Publication number: 20150321119Abstract: 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: ApplicationFiled: June 27, 2014Publication date: November 12, 2015Applicant: EASTMAN CHEMICAL COMPANYInventors: Kenny Parker, Mesfin Janka, Ashfaq Shaikh, Lee Partin
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Publication number: 20150322029Abstract: 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: ApplicationFiled: June 27, 2014Publication date: November 12, 2015Applicant: EASTMAN CHEMICAL COMPANYInventors: MESFIN JANKA, KENNY PARKER, ASHFAQ SHAIKH, LEE PARTIN
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Patent number: 9169229Abstract: 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: GrantFiled: November 7, 2014Date of Patent: October 27, 2015Assignee: Eastman Chemical CompanyInventors: Kenny Randolph Parker, Ashfaq Shaikh, Lee Reynolds Parton, Mesfin Ejerssa Janka