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:
Nov. 16, 2004
Filed:
Jul. 31, 2002
Ikuo Mimura, Uozu, JP;
Yutaka Hamada, Namerikawa, JP;
Takashi Yoshioka, Namerikawa, JP;
Akihiro Matsuda, Uozu, JP;
Nippon Carbide Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
To provide a triangular-pyramidal cube-corner retroreflective elements extremely superior in reflectivity at an entrance angle of 30° or more, preferably 40° or more. Triangular-pyramidal cube-corner retroreflective elements characterized in that when assuming the height from a bottom plane (S -S ′) including base edges (x,x, . . . ) shared by two triangular-pyramidal reflective elements faced each other up to apexes (H and H ) of the triangular-pyramidal reflective elements as h , the height from a bottom plane (S -S ′) including other base edges (y,y, . . . ) of the triangular-pyramidal reflective elements as h , and the height from a bottom plane (S —S ) including still other base edges (z,z . . . ) of the triangular-pyramidal reflective elements as h , any two of h , h , and h are substantially different from each other and a mirror reflective layer is formed on surfaces of the triangular-pyramidal reflective elements.