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. 24, 2004
Filed:
Jun. 30, 2000
Applicant:
Inventors:
Shinichi Kaneko, Aichi, JP;
Tomoyoshi Yabe, Aichi, JP;
Assignee:
Nichiha Corporation, Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 1/300 ; B32B 1/312 ;
U.S. Cl.
CPC ...
B32B 1/300 ; B32B 1/312 ;
Abstract
A building board comprising a cement substrate, a top coated layer formed on the front surface of the substrate, and a plastic sheet formed on the back surface of the substrate. The plastic sheet should preferably be formed of a polyethylene sheet. Since the impregnation of water from the back surface of building board can be effectively prevented, the change in dimension of board as a whole can be minimized.