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:
May. 01, 2018
Filed:
Feb. 26, 2014
Asahi Kasei Construction Materials Corporation, Tokyo, JP;
ASAHI KASEI CONSTRUCTION MATERIALS CORPORATION, Tokyo, JP;
Abstract
The present invention is a phenolic resin foam board having a thickness of 40 mm or more to 300 mm or less, when the phenolic resin foam board is sliced into n pieces (n≥5) at approximately equal intervals of 8 mm or more to 10 mm or less, a density of an n-th specimen is d, an average density of n pieces of specimens is d, a lowest density among the densities of n pieces of specimens is d, 0≤(d−d)/d≤0.12 is established, and when values for D=(d+d)/2 are calculated, Dvalues are plotted and points corresponding to the Dvalues are connected, resulting in a density distribution curve, no straight line parallel to the horizontal axis intersects the density distribution curve at four points.