Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Reshaping or treatment of an optical preform
Reexamination Certificate
2011-06-28
2011-06-28
Hon, Sophie (Department: 1798)
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Reshaping or treatment of an optical preform
C428S001330, C264S001700, C264S211000, C264S217000
Reexamination Certificate
active
07968019
ABSTRACT:
An object of the invention was to provide a method for producing an optical compensation film having low haze and high uniformity of retardation, and a polarization plate and a liquid crystal displaying apparatus which is considerably reduced in the visivility variation caused by heat from a direct lighting type backlight of variation of the environment conditions and the color reproducibility is excellent. Disclosed is a method for producing an optical compensation film comprising the steps of cellulose resin film formed by melt-casting a composition which containing a cellulose resin, wherein the cellulose resin has a residual sulfuric acid content of 0.1-50 ppm, providing a polymer layer on the cellulose resin film, and stretching the cellulose resin film together with the polymer layer.
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Machine translation of Murakami et al. JP 2000-352620.
Japanese Office Action (Notice of Reasons for Refusal) dated Nov. 2, 2010, which issued in Japanese Patent Application No. 2006-026238.
Holtz, Holtz, Goodman & Chick, P.C.
Hon Sophie
Konica Minolta Opto Inc.
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