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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Patent number: 8158777Abstract: 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 halide ionic liquids and at least one binary component. Cellulose esters prepared via the methods of the present invention can have a degree of substitution (“DS”) of at least 1.5 and can comprise a plurality of ester substituents, where at least 50 percent of the ester substituents comprise alkyl esters having a carbon chain length of at least 6 carbons.Type: GrantFiled: August 11, 2008Date of Patent: April 17, 2012Assignee: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Norma Lindsey Buchanan
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Patent number: 8153782Abstract: Processes for recycling an ionic liquid comprising employing an initial ionic liquid as a solvent and/or reagent resulting in a modified ionic liquid and thereafter subjecting at least a portion of the modified ionic liquid to at least one anion exchange process to produce a reformed ionic liquid. The initial ionic liquid can be employed in a cellulose esterification process, thereby producing the modified ionic liquid. At least a portion of the reformed ionic liquid can be recycled to a point upstream in the cellulose esterification process.Type: GrantFiled: February 13, 2008Date of Patent: April 10, 2012Assignee: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Norma Lindsey Buchanan
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Patent number: 8148518Abstract: Ionic liquids and cellulose ester compositions and processes and apparatus for producing ionic liquids and cellulose esters. Cellulose esters can be produced by dissolving cellulose in carboxylated ionic liquids and thereafter contacting the cellulose solution with at least one acylating reagent. Cellulose esters produced via the present invention can comprise ester groups that originate from the carboxylated ionic liquid and/or the acylating reagent.Type: GrantFiled: February 13, 2008Date of Patent: April 3, 2012Assignee: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Robert Thomas Hembre, Juanelle Little Lambert
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Publication number: 20120041080Abstract: This invention relates a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate and processes to produce the cellulose solution. Another aspect of this invention relates to shaped articles prepared from a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate. Another embodiment of this invention relates to compositions comprising derivatives of cellulose prepared from a cellulose solution comprising at least one tetraalkylammonium alkylphosphate. Another embodiment of this invention relates to compositions comprising regioselectively substituted cellulose esters prepared from a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate. In another embodiment of the invention, the cellulose esters of the present invention are used as protective and compensation films for liquid crystalline displays.Type: ApplicationFiled: October 21, 2011Publication date: February 16, 2012Applicant: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Elizabeth Guzman-Morales
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Publication number: 20120003403Abstract: The present invention relates to a multilayer cellulose ester film having a reversed optical dispersion. The film can have an A-B bi-layer or an A-B-A tri-layer configuration. The cellulose ester material for layer A has a hydroxyl degree of substitution (DSOH) from 0 to 0.5, while the cellulose ester material for layer B has a DSOH from 0.5 to 1.3. By manipulating the thickness of layers A and B, and the film stretching conditions, desirable optical retardation and optical dispersion properties can be obtained. The film can be used as an optical waveplate in liquid crystal displays to improve viewing angle, contrast ratio, and color shift.Type: ApplicationFiled: June 10, 2011Publication date: January 5, 2012Applicant: EASTMAN CHEMICAL COMPANYInventors: Bin Wang, Charles Michael Buchanan
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Publication number: 20110306760Abstract: 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 halide ionic liquids and at least one binary component. Cellulose esters prepared via the methods of the present invention can have a degree of substitution (“DS”) of at least 1.5 and can comprise a plurality of ester substituents, where at least 50 percent of the ester substituents comprise alkyl esters having a carbon chain length of at least 6 carbons.Type: ApplicationFiled: August 25, 2011Publication date: December 15, 2011Applicant: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan
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Patent number: 8067488Abstract: This invention relates a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate and processes to produce the cellulose solution. Another aspect of this invention relates to shaped articles prepared from a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate. Another embodiment of this invention relates to compositions comprising derivatives of cellulose prepared from a cellulose solution comprising at least one tetraalkylammonium alkylphosphate. Another embodiment of this invention relates to compositions comprising regioselectively substituted cellulose esters prepared from a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate. In another embodiment of the invention, the cellulose esters of the present invention are used as protective and compensation films for liquid crystalline displays.Type: GrantFiled: August 12, 2009Date of Patent: November 29, 2011Assignee: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Elizabeth Guzman-Morales
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Publication number: 20110213138Abstract: 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: August 12, 2009Publication date: September 1, 2011Applicant: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Michael Eugene Donelson, Maryna Grigoievna Gorbunova, Thauming Kuo, Bin Wang
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Publication number: 20110098464Abstract: 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: ApplicationFiled: December 22, 2010Publication date: April 28, 2011Applicant: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Susan Northrop Carty, Chung-Ming Kuo, Juanelle Little Lambert, Jessica Dee Posey-Dowty, Thelma Lee Watterson, Matthew Davie Wood, Michael Orlando Malcolm, Margaretha Soderqvist Lindblad
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Patent number: 7919631Abstract: Ionic liquids and processes and apparatus for their production. The ionic liquids can be low sulfur and low halide carboxylated ionic liquids. The ionic liquids can be produced via formation of at least one intermediate carboxylated ionic liquid, and thereafter subjecting the intermediate carboxylated ionic liquid to at least one anion exchange process.Type: GrantFiled: February 13, 2008Date of Patent: April 5, 2011Assignee: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Norma Lindsey Buchanan
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Patent number: 7879994Abstract: 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: November 23, 2004Date of Patent: February 1, 2011Assignee: Eastman Chemical CompanyInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Susan Northrop Carty, Chung-Ming Kuo, Juanelle Little Lambert, Jessica Dee Posey-Dowty, Thelma Lee Watterson, Matthew Davie Wood, Michael Orlando Malcolm, Margaretha Soderqvist Lindblad
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Publication number: 20100305249Abstract: This invention relates a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate and processes to produce the cellulose solution. Another aspect of this invention relates to shaped articles prepared from a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate. Another embodiment of this invention relates to compositions comprising derivatives of cellulose prepared from a cellulose solution comprising at least one tetraalkylammonium alkylphosphate. Another embodiment of this invention relates to compositions comprising regioselectively substituted cellulose esters prepared from a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate. In another embodiment of the invention, the cellulose esters of the present invention are used as protective and compensation films for liquid crystalline displays.Type: ApplicationFiled: August 12, 2009Publication date: December 2, 2010Applicant: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Elizabeth Guzman-Morales
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Publication number: 20100267942Abstract: This invention relates a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate and processes to produce the cellulose solution. Another aspect of this invention relates to shaped articles prepared from a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate. Another embodiment of this invention relates to compositions comprising derivatives of cellulose prepared from a cellulose solution comprising at least one tetraalkylammonium alkylphosphate. Another embodiment of this invention relates to compositions comprising regioselectively substituted cellulose esters prepared from a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate. In another embodiment of the invention, the cellulose esters of the present invention are used as protective and compensation films for liquid crystalline displays.Type: ApplicationFiled: August 12, 2009Publication date: October 21, 2010Applicant: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Elizabeth Guzman-Morales
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Publication number: 20100029927Abstract: 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: August 12, 2009Publication date: February 4, 2010Applicant: 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: 20090203898Abstract: 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 halide ionic liquids and at least one binary component. Cellulose esters prepared via the methods of the present invention can have a degree of substitution (“DS”) of at least 1.5 and can comprise a plurality of ester substituents, where at least 50 percent of the ester substituents comprise alkyl esters having a carbon chain length of at least 6 carbons.Type: ApplicationFiled: August 11, 2008Publication date: August 13, 2009Applicant: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan
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Publication number: 20090203899Abstract: 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: ApplicationFiled: August 11, 2008Publication date: August 13, 2009Applicant: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan
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Publication number: 20090203900Abstract: Ionic liquids and cellulose ester compositions and processes for producing ionic liquids and cellulose esters. Cellulose esters can be produced by subjecting a cellulose-ionic liquid solution comprising cellulose, one or more ionic liquids, and one or more co-solvents to esterification to thereby produce an esterified medium comprising a cellulose ester. The co-solvents employed in the present invention can be either miscible or immiscible with the cellulose-ionic liquid solution but can be readily dispersed or soluble in the esterified medium.Type: ApplicationFiled: August 11, 2008Publication date: August 13, 2009Applicant: Eastman Chemical ComapanyInventors: Charles Michael Buchanan, Norma Lindsey Buchanan
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Publication number: 20080194807Abstract: Processes for recycling an ionic liquid comprising employing an initial ionic liquid as a solvent and/or reagent resulting in a modified ionic liquid and thereafter subjecting at least a portion of the modified ionic liquid to at least one anion exchange process to produce a reformed ionic liquid. The initial ionic liquid can be employed in a cellulose esterification process, thereby producing the modified ionic liquid. At least a portion of the reformed ionic liquid can be recycled to a point upstream in the cellulose esterification process.Type: ApplicationFiled: February 13, 2008Publication date: August 14, 2008Applicant: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan
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Publication number: 20080194834Abstract: Ionic liquids and processes and apparatus for their production. The ionic liquids can be low sulfur and low halide carboxylated ionic liquids. The ionic liquids can be produced via formation of at least one intermediate carboxylated ionic liquid, and thereafter subjecting the intermediate carboxylated ionic liquid to at least one anion exchange process.Type: ApplicationFiled: February 13, 2008Publication date: August 14, 2008Applicant: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan
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Publication number: 20080194808Abstract: Ionic liquids and cellulose ester compositions and processes and apparatus for producing ionic liquids and cellulose esters. Cellulose esters can be produced by dissolving cellulose in carboxylated ionic liquids and thereafter contacting the cellulose solution with at least one acylating reagent. Cellulose esters produced via the present invention can comprise ester groups that originate from the carboxylated ionic liquid and/or the acylating reagent.Type: ApplicationFiled: February 13, 2008Publication date: August 14, 2008Applicant: EASTMAN CHEMICAL COMPANYInventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Robert Thomas Hembre, Juanelle Little Lambert