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:
Aug. 30, 2005
Filed:
May. 29, 2003
Masaaki Ono, Gifu, JP;
Katsuya Okamoto, Otsu, JP;
Kazuyoshi Fukata, Kusatsu, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
A polyester film comprising a coating layer which comprises organic fine particles and organic compounds on one-side surface of the polyester film, the weight ratio of the organic fine particles to the organic compounds in the coating is 1:0.2 to 1:5.0, the diameters of surface protrusions on the coating surface are 20 to 60 nm, the number of surface protrusions on the surface of the coating layer is 3 million to 100 million per square millimeter, and the surface roughness Ra of the coating surface is 0.5 to 1.9 nm, is suitable as a base film of a recording medium having excellent image quality and excellent durability without shaving an MR head.