The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2018
Filed:
Mar. 01, 2012
Charles Michael Buchanan, Bluff City, TN (US);
Michael Eugene Donelson, Kingsport, TN (US);
Elizabeth Guzman-morales, Kingsport, TN (US);
Peter Borden Mackenzie, Kingsport, TN (US);
Bin Wang, Kingsport, TN (US);
Charles Michael Buchanan, Bluff City, TN (US);
Michael Eugene Donelson, Kingsport, TN (US);
Elizabeth Guzman-Morales, Kingsport, TN (US);
Peter Borden Mackenzie, Kingsport, TN (US);
Bin Wang, Kingsport, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
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.