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. 06, 2010
Filed:
Aug. 22, 2006
Tatsukazu Kimura, Imabari, JP;
Norio Tsuno, Imabari, JP;
Seigo Ishibashi, Imabari, JP;
Hirokuni Tani, Imabari, JP;
Kenichiro Osawa, Imabari, JP;
Tatsukazu Kimura, Imabari, JP;
Norio Tsuno, Imabari, JP;
Seigo Ishibashi, Imabari, JP;
Hirokuni Tani, Imabari, JP;
Kenichiro Osawa, Imabari, JP;
Yoshino Gypsum Co., Ltd., Tokyo, JP;
Abstract
A plaster board including a plaster core having a front surface, a back surface, two opposite side surfaces and two opposite end surfaces and a covering base paper covering the front surface, back surface, and two opposite side surfaces, which core includes high-density hard edge parts including the two opposite side surfaces, at least one high-density part including the front or back surface, and having a density substantially equal to densities of the high-density hard edge parts, and a central low-density part having a density less than the densities of the high-density hard edge parts and the high-density part and being inscribed in the high-density hard edge parts and the high-density part, wherein each of the high-density hard edge parts is formed so as not to be present in the nailing area along longitudinal directions of the board in which a nail for fixing the board is driven.