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:
Jul. 05, 2005
Filed:
Feb. 06, 2004
Hiroshi Koyama, Kashima-gun, JP;
Tomotsugu Takahashi, Chiyoda-ku, JP;
Hiroshi Koyama, Kashima-gun, JP;
Tomotsugu Takahashi, Chiyoda-ku, JP;
Yupo Corporation, Tokyo, JP;
Abstract
A light reflector formed of a biaxially-stretched film which contains a thermoplastic resin and a filler and has an opacity of at least 95%, a whiteness of at least 90%, a reflectance Rof at least 92%, and an areal draw ratio of from 22 to 80 times, wherein the color difference ΔE, after irradiated with a metal halide lamp spaced from the light reflector by 10 cm under an environmental condition of 83° C. and a relative humidity of 50% and at an intensity of radiation of 90 mW/cmfor 10 hours, is at most 10. The reflector is free from the trouble of yellowing as in white polyester films heretofore used in reflectors and is stable against color change for a long period of time.