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
Eastman Chemical Company, Kingsport, TN (US);
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);
Eastman Chemical Company, Kingsport, TN (US);
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.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile