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:
Apr. 19, 2005
Filed:
Apr. 23, 2001
Nobuaki Kido, Iwakuni, JP;
Shunichi Matsumura, Iwakuni, JP;
Kaoru Iwata, Hachioji, JP;
Takashi Kushida, Hino, JP;
Akihiko Uchiyama, Hino, JP;
Michio Yamaura, Hachioji, JP;
Takeshi Sasaki, Iwakuni, JP;
Kiyonari Hashidzume, Iwakuni, JP;
Nobuaki Kido, Iwakuni, JP;
Shunichi Matsumura, Iwakuni, JP;
Kaoru Iwata, Hachioji, JP;
Takashi Kushida, Hino, JP;
Akihiko Uchiyama, Hino, JP;
Michio Yamaura, Hachioji, JP;
Takeshi Sasaki, Iwakuni, JP;
Kiyonari Hashidzume, Iwakuni, JP;
Teijin Limited, Osaka, JP;
Bayer AG, Leverkusen, DE;
Abstract
A film which is a single polymer film and has a smaller phase difference as the wavelength becomes shorter. This film is made from an olefin-based polymer which has an alicyclic group in the side chain, such as hydrogenated polystyrene, the amount of the alicyclic group in the side chain being 60 to 90 wt % based on the whole polymer, and satisfies the following expression:(450)/(550)<1wherein R(450) and R(550) are phase differences on the film plane at a wavelength of 450 nm and a wavelength of 550 nm, respectively.