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:
Feb. 12, 2002
Filed:
Jan. 10, 2001
Kohei Arakawa, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Minami-Ashigara, JP;
Abstract
A phase difference plate is provided which can be formed by a single material at a low cost without a need for forming laminated layers, and which has excellent performance in a wide band. The phase difference plate is formed by using a norbornene based resin composition which includes a norbornene based resin; and a polymer whose birefringence value is negative, and whose wavelength dispersion of birefringence values satisfies |&Dgr;n(450)/&Dgr;n(550)|≧1.02, wherein &Dgr;n(450) and &Dgr;n(550) are birefringence values (&Dgr;n) at a wavelength of 450 nm and a wavelength of 550 nm, respectively. The polymer is preferably a polystyrene based polymer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile