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. 20, 2021
Filed:
Nov. 09, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Kazuhiko Araki, Kawasaki, JP;
Tetsuro Noguchi, Hachioji, JP;
Arika Tanaka, Yokohama, JP;
Shoichi Takeda, Yokohama, JP;
Hiroo Miyamoto, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A recording medium substrate in an aspect of the present invention is a recording medium substrate having a base paper and a stretched film layer on the base paper, wherein the stretched film layer has a thickness of 70 μm or more, and the recording medium substrate has an average surface roughness of 0.3 μm or less. A recording medium in another aspect of the present invention includes a recording medium substrate, a first ink receiving layer on the recording medium substrate, and a second ink receiving layer on the first ink receiving layer, wherein the first ink receiving layer is in contact with the second ink receiving layer, the first ink receiving layer contains an alumina hydrate and a hydroxy acid, the second ink receiving layer contains an alumina hydrate and a sulfonic acid.