Patents by Inventor William K. Wang
William K. Wang 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: 12454499Abstract: A process for oxidative dehydrogenation of a hydrocarbon to produce an olefin and water may include contacting, in a fluidized bed, the hydrocarbon with a particulate material, which may include at least one oxygen transfer agent (OTA) and at least one fluidization enhancing additive. During at least a portion of contacting the hydrocarbon with the particulate material, the fluidized bed may be at a temperature at or above a melting point of one or more materials of the oxygen transfer agent. Further, during at least a portion of contacting the hydrocarbon with the particulate material, a surface of at least a portion of the OTA may comprise a molten layer. The fluidization enhancing additive may not undergo reduction in the fluidized bed during contacting the hydrocarbon with the particulate material and may be present in an amount that maintains sufficient fluidization of the particulate material.Type: GrantFiled: February 19, 2021Date of Patent: October 28, 2025Assignees: Dow Global Technologies LLC, EcoCatalytic Inc.Inventors: Elena Y. Chung, John A. Sofranko, William K. Wang, Soumen Kundu, Hangyao Wang, Barry B. Fish, Matthew T. Pretz
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Publication number: 20230089190Abstract: A process for oxidative dehydrogenation of a hydrocarbon to produce an olefin and water may include contacting, in a fluidized bed, the hydrocarbon with a particulate material, which may include at least one oxygen transfer agent (OTA) and at least one fluidization enhancing additive. During at least a portion of contacting the hydrocarbon with the particulate material, the fluidized bed may be at a temperature at or above a melting point of one or more materials of the oxygen transfer agent. Further, during at least a portion of contacting the hydrocarbon with the particulate material, a surface of at least a portion of the OTA may comprise a molten layer. The fluidization enhancing additive may not undergo reduction in the fluidized bed during contacting the hydrocarbon with the particulate material and may be present in an amount that maintains sufficient fluidization of the particulate material.Type: ApplicationFiled: February 19, 2021Publication date: March 23, 2023Applicants: Dow Global Technologies LLC, EcoCatalytic Inc.Inventors: Elena Y. Chung, John A. Sofranko, William K. Wang, Soumen Kundu, Hangyao Wang, Barry B. Fish, Matthew T. Pretz
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Publication number: 20210395370Abstract: The present invention provides methods for isolating an active polypeptide or immunoconjugate by purification of a solution containing both the active polypeptide or immunoconjugate and an acidic variant thereof, such as a deamidated variant, using anion exchange chromatography. The present invention also provides compositions, formulations, and unit dosage forms comprising the purified polypeptide or immunoconjugate.Type: ApplicationFiled: September 2, 2021Publication date: December 23, 2021Inventors: Thomas LINKE, William K. WANG, Ambarish SHAH, Hasige SATHISH, Alan HUNTER, Christopher THOMPSON
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Patent number: 11136396Abstract: The present invention provides methods for isolating an active polypeptide or immunoconjugate by purification of a solution containing both the active polypeptide or immunoconjugate and an acidic variant thereof, such as a deamidated variant, using anion exchange chromatography. The present invention also provides compositions, formulations, and unit dosage forms comprising the purified polypeptide or immunoconjugate.Type: GrantFiled: February 10, 2020Date of Patent: October 5, 2021Assignee: MedImmune LimitedInventors: Thomas Linke, William K. Wang, Ambarish Shah, Hasige Sathish, Alan Hunter, Christopher Thompson
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Patent number: 11046892Abstract: Aspects of the invention relate to producing olefins and other products by oxidative dehydrogenation cracking of a hydrocarbon feed. In one embodiment, the method includes oxidative cracking a hydrocarbon feed comprised of plastic waste. Methods of the present invention employ dual functional catalyst comprising solid acids and metal oxides, which are capable of selectively oxidizing hydrogen to water rather than combustion of the hydrocarbon feeds or products. Additional aspects of the invention demonstrate catalyst synthetic methods for encapsulating metal oxides in the internal channels and cages of solid acids, thereby improving the selective oxidation of hydrogen to water and decreasing feed and product oxidation. The re-oxidation of the thus reduced metal oxide transfer agents supplies heat to drive the endothermic cracking of the feed.Type: GrantFiled: February 25, 2020Date of Patent: June 29, 2021Assignee: EcoCatalytic Inc.Inventors: John A. Sofranko, Elena Y. Chung, William K. Wang, C. Andrew Jones
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Patent number: 11046625Abstract: A system for oxidative conversion of a mixed hydrocarbon feed stream to a product stream containing at least one olefin is provided. The system includes a plurality of reactors each capable of oxidatively dehydrogenating at least a portion of a hydrocarbon in the mixed hydrocarbon feed, and each reactor able to operate at different set of reaction conditions from other reactors in the plurality of reactors. All of the reactors use the same oxygen transfer agent to produce at least one olefin. In some embodiments, at least one reactor is optimized to oxidatively couple methane to produce ethylene, while other reactors are optimized to oxidatively dehydrogenate ethane to ethylene or to oxidatively dehydrogenate propane to ethylene and/or propylene. All of the reactors feed into a single regeneration unit for the oxygen transfer agent. A method of oxidatively converting the mixed hydrocarbon feed to an olefin is also provided.Type: GrantFiled: May 29, 2020Date of Patent: June 29, 2021Assignee: EcoCatalytic Inc.Inventors: John A. Sofranko, Elena Y. Chung, William K. Wang
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Publication number: 20200231680Abstract: The present invention provides methods for isolating an active polypeptide or immunoconjugate by purification of a solution containing both the active polypeptide or immunoconjugate and an acidic variant thereof, such as a deamidated variant, using anion exchange chromatography. The present invention also provides compositions, formulations, and unit dosage forms comprising the purified polypeptide or immunoconjugate.Type: ApplicationFiled: February 10, 2020Publication date: July 23, 2020Inventors: Thomas LINKE, William K. WANG, Ambarish SHAH, Hasige SATHISH, Alan HUNTER, Christopher THOMPSON
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Patent number: 10556955Abstract: The present invention provides methods for isolating an active polypeptide or immunoconjugate by purification of a solution containing both the active polypeptide or immunoconjugate and an acidic variant thereof, such as a deamidated variant, using anion exchange chromatography. The present invention also provides compositions, formulations, and unit dosage forms comprising the purified polypeptide or immunoconjugate.Type: GrantFiled: September 7, 2018Date of Patent: February 11, 2020Assignee: MedImmune LimitedInventors: Thomas Linke, William K. Wang, Ambarish Shah, Hasige Sathish, Alan Hunter, Christopher Thompson
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Publication number: 20180371094Abstract: The present invention provides methods for isolating an active polypeptide or immunoconjugate by purification of a solution containing both the active polypeptide or immunoconjugate and an acidic variant thereof, such as a deamidated variant, using anion exchange chromatography. The present invention also provides compositions, formulations, and unit dosage forms comprising the purified polypeptide or immunoconjugate.Type: ApplicationFiled: September 7, 2018Publication date: December 27, 2018Inventors: Thomas LINKE, William K. WANG, Ambarish SHAH, Hasige SATHISH, Alan HUNTER, Christopher THOMPSON
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Patent number: 10072083Abstract: The present invention provides methods for isolating an active polypeptide or immunoconjugate by purification of a solution containing both the active polypeptide or immunoconjugate and an acidic variant thereof, such as a deamidated variant, using anion exchange chromatography. The present invention also provides compositions, formulations, and unit dosage forms comprising the purified polypeptide or immunoconjugate.Type: GrantFiled: February 3, 2017Date of Patent: September 11, 2018Assignee: MedImmune, LLCInventors: Thomas Linke, William K. Wang, Ambarish Shah, Hasige Sathish, Alan Hunter, Christopher Thompson
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Publication number: 20170145100Abstract: The present invention provides methods for isolating an active polypeptide or immunoconjugate by purification of a solution containing both the active polypeptide or immunoconjugate and an acidic variant thereof, such as a deamidated variant, using anion exchange chromatography. The present invention also provides compositions, formulations, and unit dosage forms comprising the purified polypeptide or immunoconjugate.Type: ApplicationFiled: February 3, 2017Publication date: May 25, 2017Inventors: Thomas LINKE, William K. WANG, Ambarish SHAH, Hasige SATHISH, Alan HUNTER, Christopher THOMPSON
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Patent number: 9580461Abstract: The present invention provides methods for isolating an active polypeptide or immunoconjugate by purification of a solution containing both the active polypeptide or immunoconjugate and an acidic variant thereof, such as a deamidated variant, using anion exchange chromatography.Type: GrantFiled: July 27, 2011Date of Patent: February 28, 2017Assignee: MedImmune, LLCInventors: Thomas Linke, William K. Wang, Ambarish Shah, Hasige Sathish, Alan Hunter, Christopher Thompson
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Publication number: 20130202626Abstract: The present invention provides methods for isolating an active polypeptide or immunoconjugate by purification of a solution containing both the active polypeptide or immunoconjugate and an acidic variant thereof, such as a deamidated variant, using anion exchange chromatography.Type: ApplicationFiled: July 27, 2011Publication date: August 8, 2013Applicant: MEDIMMUNE, LLCInventors: Thomas Linke, William K. Wang, Ambarish Shah, Hasige Sathish, Alan Hunter, Christopher Thompson