Patents by Inventor Charles Michael Buchanan
Charles Michael Buchanan 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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Publication number: 20230138841Abstract: The present application discloses films comprising regioselectively substituted cellulose esters and a component A wherein rings A, B, C, R1, R2, R5, R6, R8, m, n, and k are defined herein. The films are C+ films that exhibit improved wavelength dispersion.Type: ApplicationFiled: February 10, 2021Publication date: May 4, 2023Applicant: Eastman Chemical CompanyInventors: Qianqian Zhang, Bin Wang, Robert Jacks Sharpe, Wesley Wayne McConnell, Casey Lynn Elkins, Charles Michael Buchanan
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Publication number: 20230074167Abstract: The present application discloses stretched films comprising regioselectively substituted cellulose esters and a component A: (I), (II), (III), or (IV), wherein A, B, C, R1, R2, R5, R6, R8, R9, m, n, and k are defined herein. The films exhibit negative birefringence and improved wavelength dispersion.Type: ApplicationFiled: February 10, 2021Publication date: March 9, 2023Applicant: Eastman Chemical CompanyInventors: Qianqian Zhang, Charles Michael Buchanan, Casey Lynn Elkins, Wesley Wayne McConnell, Bin Wang, Robert Jacks Sharpe, Mustafa Humbel Ahmed
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Patent number: 10836835Abstract: Regioselectively substituted cellulose esters having a plurality of aryl-acyl substituents and a plurality of alkyl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in optical films, such as optical films having certain Nz values, ?A optical films, and/or +C optical films. Optical films prepared employing such cellulose esters have a variety of commercial applications, such as, for example, as compensation films in liquid crystal displays and/or waveplates in creating circular polarized light used in 3-D technology.Type: GrantFiled: October 28, 2019Date of Patent: November 17, 2020Assignee: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Michael Eugene Donelson, Elizabeth Guzman-Morales, Peter Borden Mackenzie, Bin Wang
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Publication number: 20200055960Abstract: Regioselectively substituted cellulose esters having a plurality of aryl-acyl substituents and a plurality of alkyl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in optical films, such as optical films having certain Nz values, ?A optical films, and/or +C optical films. Optical films prepared employing such cellulose esters have a variety of commercial applications, such as, for example, as compensation films in liquid crystal displays and/or waveplates in creating circular polarized light used in 3-D technology.Type: ApplicationFiled: October 28, 2019Publication date: February 20, 2020Applicant: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Michael Eugene Donelson, Elizabeth Guzman-Morales, Peter Borden Mackenzie, Bin Wang
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Patent number: 10494447Abstract: Regioselectively substituted cellulose esters having a plurality of aryl-acyl substituents and a plurality of alkyl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in optical films, such as optical films having certain Nz values, ?A optical films, and/or +C optical films. Optical films prepared employing such cellulose esters have a variety of commercial applications, such as, for example, as compensation films in liquid crystal displays and/or waveplates in creating circular polarized light used in 3-D technology.Type: GrantFiled: May 9, 2018Date of Patent: December 3, 2019Assignee: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Michael Eugene Donelson, Elizabeth Guzman-Morales, Peter Borden Mackenzie, Bin Wang
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Patent number: 10174129Abstract: This invention relates to novel compositions comprising regioselectively substituted cellulose esters. One aspect of the invention relates to processes for preparing regioselectively substituted cellulose esters from cellulose dissolved in ionic liquids. Another aspect of the invention relates to the utility of regioselectively substituted cellulose esters in applications such as protective and compensation films for liquid crystalline displays.Type: GrantFiled: February 6, 2017Date of Patent: January 8, 2019Assignee: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Robert Thomas Hembre, Juanelle Little Lambert, Michael Eugene Donelson, Maryna Grigorievna Gorbunova, Thauming Kuo, Bin Wang
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Publication number: 20180258189Abstract: Regioselectively substituted cellulose esters having a plurality of aryl-acyl substituents and a plurality of alkyl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in optical films, such as optical films having certain Nz values, ?A optical films, and/or +C optical films. Optical films prepared employing such cellulose esters have a variety of commercial applications, such as, for example, as compensation films in liquid crystal displays and/or waveplates in creating circular polarized light used in 3-D technology.Type: ApplicationFiled: May 9, 2018Publication date: September 13, 2018Applicant: EASTMAN CHEMICAL COMPANYInventors: CHARLES MICHAEL BUCHANAN, MICHAEL EUGENE DONELSON, ELIZABETH GUZMAN-MORALES, PETER BORDEN MACKENZIE, BIN WANG
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Patent number: 9975967Abstract: Regioselectively substituted cellulose esters having a plurality of aryl-acyl substituents and a plurality of alkyl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in optical films, such as optical films having certain Nz values, ?A optical films, and/or +C optical films. Optical films prepared employing such cellulose esters have a variety of commercial applications, such as, for example, as compensation films in liquid crystal displays and/or waveplates in creating circular polarized light used in 3-D technology.Type: GrantFiled: March 1, 2012Date of Patent: May 22, 2018Assignee: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Michael Eugene Donelson, Elizabeth Guzman-Morales, Peter Borden Mackenzie, Bin Wang
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Patent number: 9834516Abstract: This invention relates to novel compositions comprising regioselectively substituted cellulose esters. One aspect of the invention relates to processes for preparing regioselectively substituted cellulose esters from cellulose dissolved in ionic liquids. Another aspect of the invention relates to the utility of regioselectively substituted cellulose esters in applications such as protective and compensation films for liquid crystalline displays.Type: GrantFiled: August 12, 2009Date of Patent: December 5, 2017Assignee: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Robert Thomas Hembre, Juanelle Little Lambert, Michael Eugene Donelson, Maryna Grigorievna Gorbunova, Thauming Kuo, Bin Wang
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Patent number: 9796791Abstract: Regioselectively substituted cellulose esters having a plurality of aryl-acyl substituents and a plurality of alkyl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in optical films, such as optical films having certain Nz values, ?A optical films, and/or +C optical films. Optical films prepared employing such cellulose esters have a variety of commercial applications, such as, for example, as compensation films in liquid crystal displays and/or waveplates in creating circular polarized light used in 3-D technology.Type: GrantFiled: March 1, 2012Date of Patent: October 24, 2017Assignee: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Michael Eugene Donelson, Elizabeth Guzman-Morales, Peter Borden Mackenzie, Bin Wang
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Patent number: 9777074Abstract: This invention relates to novel compositions comprising regioselectively substituted cellulose esters. One aspect of the invention relates to processes for preparing regioselectively substituted cellulose esters from cellulose dissolved in ionic liquids. Another aspect of the invention relates to the utility of regioselectively substituted cellulose esters in applications such as protective and compensation films for liquid crystalline displays.Type: GrantFiled: September 18, 2015Date of Patent: October 3, 2017Assignee: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Michael Eugene Donelson, Maryna Grigorievna Gorbunova, Thauming Kuo, Bin Wang
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Publication number: 20170204201Abstract: This invention relates to novel compositions comprising regioselectively substituted cellulose esters. One aspect of the invention relates to processes for preparing regioselectively substituted cellulose esters from cellulose dissolved in ionic liquids. Another aspect of the invention relates to the utility of regioselectively substituted cellulose esters in applications such as protective and compensation films for liquid crystalline displays.Type: ApplicationFiled: February 6, 2017Publication date: July 20, 2017Applicant: EASTMAN CHEMICAL COMPANYInventors: CHARLES MICHAEL BUCHANAN, NORMA LINDSEY BUCHANAN, ROBERT THOMAS HEMBRE, JUANELLE LITTLE LAMBERT, MICHAEL EUGENE DONELSON, MARYNA GRIGORIEVNA GORBUNOVA, THAUMING KUO, BIN WANG
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Publication number: 20160108137Abstract: This invention relates to novel compositions comprising regioselectively substituted cellulose esters. One aspect of the invention relates to processes for preparing regioselectively substituted cellulose esters from cellulose dissolved in ionic liquids. Another aspect of the invention relates to the utility of regioselectively substituted cellulose esters in applications such as protective and compensation films for liquid crystalline displays.Type: ApplicationFiled: September 18, 2015Publication date: April 21, 2016Applicant: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Michael Eugene Donelson, Maryna Grigorievna Gorbunova, Thauming Kuo, Bin Wang
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Patent number: 9243072Abstract: This invention provides cellulose ester interpolymers, and methods of oxidizing cellulose interpolymers and cellulose ester interpolymers. The invention also provides routes to access carboxylated cellulose ester derivatives with high acid numbers wherein the carboxyl group is attached directly to the cellulose backbone by a carbon-carbon bond. Through functionalization of an intermediate aldehyde, the corresponding cationic or zwitterionic cellulose ester derivatives can also be accessed. The interpolymers of the present invention have a number of end-use applications, for example, as binder resins in various types of coating compositions and as drug delivery agents.Type: GrantFiled: December 27, 2012Date of Patent: January 26, 2016Assignee: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Susan Northrop Carty, Chung-Ming Kuo, Juanelle Little Lambert, Michael Orlando Malcolm, Jessica Dee Posey-Dowty, Thelma Lee Watterson, Matthew Davie Wood, Margaretha Soderqvist Lindblad
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Patent number: 9175096Abstract: This invention relates to novel compositions comprising regioselectively substituted cellulose esters. One aspect of the invention relates to processes for preparing regioselectively substituted cellulose esters from cellulose dissolved in ionic liquids. Another aspect of the invention relates to the utility of regioselectively substituted cellulose esters in applications such as protective and compensation films for liquid crystalline displays.Type: GrantFiled: December 6, 2012Date of Patent: November 3, 2015Assignee: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Michael Eugene Donelson, Maryna Grigorievna Gorbunova, Thauming Kuo, Bin Wang
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Patent number: 9156918Abstract: Ionic liquids and cellulose ester compositions and processes for producing ionic liquids and cellulose esters. Cellulose esters can be produced by esterifying cellulose in a reaction medium comprising one or more ionic liquids. Cellulose esters prepared via the methods of the present invention can be contacted with at least one bleaching agent to produce bleached cellulose esters having a ?E value of less than 30.Type: GrantFiled: April 18, 2012Date of Patent: October 13, 2015Assignee: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan
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Patent number: 9150665Abstract: This invention provides cellulose ester interpolymers, and methods of oxidizing cellulose interpolymers and cellulose ester interpolymers. The invention also provides routes to access carboxylated cellulose ester derivatives with high acid numbers wherein the carboxyl group is attached directly to the cellulose backbone by a carbon-carbon bond. Through functionalization of an intermediate aldehyde, the corresponding cationic or zwitterionic cellulose ester derivatives can also be accessed. The interpolymers of the present invention have a number of end-use applications, for example, as binder resins in various types of coating compositions and as drug delivery agents.Type: GrantFiled: December 27, 2012Date of Patent: October 6, 2015Assignee: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Susan Northrop Carty, Chung-Ming Kuo, Juanelle Little Lambert, Michael Orlando Malcolm, Jessica Dee Posey-Dowty, Thelma Lee Watterson, Matthew Davie Wood, Margaretha Soderqvist Lindblad
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Patent number: 9096691Abstract: Regioselectively substituted cellulose esters having a plurality of aryl-acyl substituents and a plurality of alkyl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in optical films, such as optical films having certain Nz values, ?A optical films, and/or +C optical films. Optical films prepared employing such cellulose esters have a variety of commercial applications, such as, for example, as compensation films in liquid crystal displays and/or waveplates in creating circular polarized light used in 3-D technology.Type: GrantFiled: March 1, 2012Date of Patent: August 4, 2015Assignee: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Michael Eugene Donelson, Elizabeth Guzman-Morales, Peter Borden Mackenzie, Bin Wang
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Patent number: 9040683Abstract: This invention provides cellulose ester interpolymers, and methods of oxidizing cellulose interpolymers and cellulose ester interpolymers. The invention also provides routes to access carboxylated cellulose ester derivatives with high acid numbers wherein the carboxyl group is attached directly to the cellulose backbone by a carbon-carbon bond. Through functionalization of an intermediate aldehyde, the corresponding cationic or zwitterionic cellulose ester derivatives can also be accessed. The interpolymers of the present invention have a number of end-use applications, for example, as binder resins in various types of coating compositions and as drug delivery agents.Type: GrantFiled: December 27, 2012Date of Patent: May 26, 2015Assignee: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Susan Northrop Carty, Chung-Ming Kuo, Juanelle Little Lambert, Michael Orlando Malcolm, Jessica Dee Posey-Dowty, Thelma Lee Watterson, Matthew Davie Wood, Margaretha Soderqvist Lindblad
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Patent number: 9040684Abstract: This invention provides cellulose ester interpolymers, and methods of oxidizing cellulose interpolymers and cellulose ester interpolymers. The invention also provides routes to access carboxylated cellulose ester derivatives with high acid numbers wherein the carboxyl group is attached directly to the cellulose backbone by a carbon-carbon bond. Through functionalization of an intermediate aldehyde, the corresponding cationic or zwitterionic cellulose ester derivatives can also be accessed. The interpolymers of the present invention have a number of end-use applications, for example, as binder resins in various types of coating compositions and as drug delivery agents.Type: GrantFiled: December 27, 2012Date of Patent: May 26, 2015Assignee: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Susan Northrop Carty, Chung-Ming Kuo, Juanelle Little Lambert, Michael Orlando Malcolm, Jessica Dee Posey-Dowty, Thelma Lee Watterson, Matthew Davie Wood, Margaretha Soderqvist Lindblad