US Patent Issued to ZEON on June 3 for "Phase contrast film and production method therefor" (Japanese Inventor)

ALEXANDRIA, Va., June 4 -- United States Patent no. 12,319,782, issued on June 3, was assigned to ZEON Corp. (Tokyo).

"Phase contrast film and production method therefor" was invented by Kyosuke Inoue (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A phase difference film formed of a resin containing a polymer having crystallizability, wherein: a coefficient of variation CV(Re) of an in-plane retardation of the phase difference film at a measurement wavelength of 590 nm is 1.0% or less."

The patent was filed on Aug. 27, 2020, under Application No. 17/635,698.

*For further information, including images, charts and tables, please visit: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&...