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:
Aug. 11, 2026
Filed:
Feb. 10, 2021
Applicant:
Eastman Chemical Company, Kingsport, TN (US);
Inventors:
Qianqian Zhang, Kingsport, TN (US);
Charles Michael Buchanan, Bluff City, TN (US);
Casey Lynn Elkins, Kingsport, TN (US);
Wesley Wayne Mcconnell, Gray, TN (US);
Bin Wang, Kingsport, TN (US);
Robert Jacks Sharpe, Madison, AL (US);
Mustafa Humbel Ahmed, Lafayette, IN (US);
Assignee:
Eastman Chemical Company, Kingsport, TN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 5/18 (2006.01); C08B 3/16 (2006.01); G02F 1/13363 (2006.01);
U.S. Cl.
CPC ...
C08J 5/18 (2013.01); C08B 3/16 (2013.01); C08J 2301/14 (2013.01); G02F 1/133637 (2021.01);
Abstract
The present application discloses stretched films comprising regioselectively substituted cellulose esters and a component A wherein rings A, B, C, R, R, R, R, R, R9, m, n, and k are defined herein. The films exhibit negative birefringence and improved wavelength dispersion.