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. 08, 2018
Filed:
Mar. 08, 2016
Applicant:
Eastman Chemical Company, Kingsport, TN (US);
Inventors:
Bin Wang, Kingsport, TN (US);
Thauming Kuo, Kingsport, TN (US);
Michael Eugene Donelson, Kingsport, TN (US);
Douglas Stephens McWilliams, Piney Flats, TN (US);
Assignee:
Eastman Chemical Company, Kingsport, TN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09K 19/00 (2006.01); G02B 1/08 (2006.01); G02B 5/30 (2006.01); C08J 5/18 (2006.01); C08K 5/01 (2006.01); C08K 5/105 (2006.01);
U.S. Cl.
CPC ...
G02B 1/08 (2013.01); C08J 5/18 (2013.01); G02B 5/3083 (2013.01); C08J 2301/12 (2013.01); C08J 2301/14 (2013.01); C08K 5/01 (2013.01); C08K 5/105 (2013.01); Y10T 428/105 (2015.01); Y10T 428/1036 (2015.01);
Abstract
The present invention pertains to an optical film for use as a quarter wave plate (QWP) having a normal wavelength dispersion curve. More specifically, this invention relates to a quarter wave plate based on cellulose ester polymer and fused ring additives.