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:
Mar. 11, 2008
Filed:
Jun. 24, 2004
Ichihiko Takahashi, Tokyo, JP;
Michio Ushijima, Tokyo, JP;
Mitsuhiko Uchida, Tokyo, JP;
Tomio Onoguchi, Tokyo, JP;
Ichihiko Takahashi, Tokyo, JP;
Michio Ushijima, Tokyo, JP;
Mitsuhiko Uchida, Tokyo, JP;
Tomio Onoguchi, Tokyo, JP;
National Maritime Research Institute, Tokyo, JP;
Three Bond Co., Ltd., Tokyo, JP;
Abstract
In a coating for the inspection of a crack in a structure wherein a coating layer having dispersed therein microcapsules with a visualizing liquid sealed therein is formed on the surface of the structure and when a crack is developed in the structure and propagated to the coating layer, the microcapsules dispersed in the coating layer are ruptured and the visualizing liquid flows out from the ruptured microcapsules and reaches the surface of the coating layer along the crack in the coating layer, thereby making it possible to detect the occurrence of the crack in the structure: at least one second coating layer not containing the microcapsules is formed over the first coating layer with the microcapsules dispersed therein, the second coating layer being transparent and having an outermost layer flexible enough to be prevented from being cracked even upon cracking in the first coating layer.