Patents by Inventor Yue Rachel Hu
Yue Rachel Hu 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: 11518726Abstract: Provided is a process for the preparation of certain 1,4-bicyclo[2.2.2]octane derivatives. The new synthetic procedure involves treating 1,4-dimethylene cyclohexane with an oxidizing agent in the presence of a transition metal catalyst to afford an oxo-substituted bicyclo[2.2.2]octane species. This intermediate structure can then be further derivatized. The processes of this disclosure thus affords a novel and simplified means for the commercial production of a wide variety of bicyclo[2.2.2]octane derivatives.Type: GrantFiled: October 10, 2018Date of Patent: December 6, 2022Assignee: Eastman Chemical CompanyInventors: Yue Rachel Hu, Robert Thomas Hembre, Gerald Charles Tustin, Zhufang Liu, Steven J. Adams
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Patent number: 10836899Abstract: A semi-crystalline polyester comprising a repeat unit of the formula: wherein A is an aliphatic, aromatic, or heterocyclic group; R1 is selected from the group consisting of 1,4-butanediol residue and 1,4-cyclohexanedimethanol residue; R2 is neopentanediol residue; m is between 50 and 99 inclusive; n is between 1 and 50 inclusive; x is between 1 and 200 inclusive; and wherein said semi-crystalline polyester exhibits a minimum crystallization half-time of about 0.3 minutes or greater, or about 0.5 minutes or greater or about 0.6 minutes or greater or about 0.7 minutes or greater is described. The polyesters of the present invention may in various embodiments demonstrate one or more desirable performance characteristics and accordingly are particularly useful in applications and utilities wherein those high levels of performance for such characteristics are required. A process for forming the semi-crystalline polyester is also disclosed.Type: GrantFiled: December 13, 2018Date of Patent: November 17, 2020Assignee: Eastman Chemical CompanyInventors: David Scott Porter, Wentao Li, Sarah Exley Goetz, Aireal Denise Pressley, Amit Vasant Desai, Yue Rachel Hu, Steven J. Adams
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Publication number: 20200317910Abstract: A semi-crystalline polyester comprising a repeat unit of the formula: wherein A is an aliphatic, aromatic, or heterocyclic group; R1 is selected from the group consisting of 1,4-butanediol residue and 1,4-cyclohexanedimethanol residue; R2 is neopentanediol residue; m is between 50 and 99 inclusive; n is between 1 and 50 inclusive; x is between 1 and 200 inclusive; and wherein said semi-crystalline polyester exhibits a minimum crystallization half-time of about 0.3 minutes or greater, or about 0.5 minutes or greater or about 0.6 minutes or greater or about 0.7 minutes or greater is described. The polyesters of the present invention may in various embodiments demonstrate one or more desirable performance characteristics and accordingly are particularly useful in applications and utilities wherein those high levels of performance for such characteristics are required. A process for forming the semi-crystalline polyester is also disclosed.Type: ApplicationFiled: June 17, 2020Publication date: October 8, 2020Applicant: Eastman Chemical CompanyInventors: David Scott Porter, Wentao Li, Sarah Exley Goetz, Aireal Denise Pressley, Amit Vasant Desai, Yue Rachel Hu, Steven J. Adams
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Publication number: 20200270191Abstract: Provided is a process for the preparation of certain 1,4-bicyclo[2.2.2]octane derivatives. The new synthetic procedure involves treating 1,4-dimethylene cyclohexane with an oxidizing agent in the presence of a transition metal catalyst to afford an oxo-substituted bicyclo[2.2.2]octane species. This intermediate structure can then be further derivatized. The processes of this disclosure thus affords a novel and simplified means for the commercial production of a wide variety of bicyclo[2.2.2]octane derivatives.Type: ApplicationFiled: October 10, 2018Publication date: August 27, 2020Applicant: Eastman Chemical CompanyInventors: Yue Rachel HU, Robert Thomas HEMBRE, Gerald Charles TUSTIN, Zhufang LIU, Steven J. ADAMS
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Publication number: 20200190318Abstract: A semi-crystalline polyester comprising a repeat unit of the formula: wherein A is an aliphatic, aromatic, or heterocyclic group; R1 is selected from the group consisting of 1,4-butanediol residue and 1,4-cyclohexanedimethanol residue; R2 is neopentanediol residue; m is between 50 and 99 inclusive; n is between 1 and 50 inclusive; x is between 1 and 200 inclusive; and wherein said semi-crystalline polyester exhibits a minimum crystallization half-time of about 0.3 minutes or greater, or about 0.5 minutes or greater or about 0.6 minutes or greater or about 0.7 minutes or greater is described. The polyesters of the present invention may in various embodiments demonstrate one or more desirable performance characteristics and accordingly are particularly useful in applications and utilities wherein those high levels of performance for such characteristics are required. A process for forming the semi-crystalline polyester is also disclosed.Type: ApplicationFiled: December 13, 2018Publication date: June 18, 2020Applicant: Eastman Chemical CompanyInventors: David Scott Porter, Wentao Li, Sarah Exley Goetz, Aireal Denise Pressley, Amit Vasant Desai, Yue Rachel Hu, Steven J. Adams
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Patent number: 10633315Abstract: Provided is a process for the preparation of certain 1,4-bicyclo[2.2.2]octane derivatives. The new synthetic procedure involves treating 1,4-dimethylene cyclohexane with an oxidizing agent in the presence of a transition metal catalyst comprising a palladium compound to afford certain oxo-substituted bicyclo[2.2.2]octane species. The process of the invention thus affords a novel and simplified means for the commercial production of a wide variety of bicyclo[2.2.2]octane derivatives.Type: GrantFiled: October 11, 2017Date of Patent: April 28, 2020Assignee: Eastman Chemical CompanyInventors: Yue Rachel Hu, Robert Thomas Hembre, Gerald Charles Tustin, Christopher Harlan Burk
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Publication number: 20200039906Abstract: Provided is a process for the preparation of certain 1,4-bicyclo[2.2.2]octane derivatives. The new synthetic procedure involves treating 1,4-dimethylene cyclohexane with an oxidizing agent in the presence of a transition metal catalyst comprising a palladium compound to afford certain oxo-substituted bicyclo[2.2.2]octane species. The process of the invention thus affords a novel and simplified means for the commercial production of a wide variety of bicyclo[2.2.2]octane derivatives.Type: ApplicationFiled: October 11, 2017Publication date: February 6, 2020Applicant: Eastman Chemical CompanyInventors: Yue Rachel Hu, Robert Thomas Hembre, Gerald Charles Tustin, Christopher Harlan Burk