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:
Jan. 20, 2009
Filed:
Jun. 28, 2006
Minori Tamagawa, Hino, JP;
Isamu Michihata, Machida, JP;
Noriyasu Kuzuhara, Kunitachi, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
A retardation film which contains a cellulose derivative and a plasticizer wherein the thickness of the film is 10 to 50 μm, Ro in Equation (i) is in the range of 30 to 100 nm, Rt in Equation (ii) is in the range of 100 to 300 nm, and S in Equation (iii) is 0.0002 or more but not exceeding 0.030.=()×  Equation (i)  Equation (ii)=(()/2)  Equation (iii)(where 'nx' is a maximum refraction index of the film surface, 'ny' is a refraction index in the direction perpendicular to “nx,” “nz” is a refraction index along the thickness of the film, and “d” is the thickness of the film.)