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. 02, 2004
Filed:
Mar. 28, 2000
Noboru Nonoyama, Tokyo, JP;
Hiromi Koga, Tokyo, JP;
Ishihara Sangyo Kaisha, Ltd., Osaka, JP;
Abstract
At least one part of a road surface is covered by a photocatalyst layer containing a photocatalyst such as titanium dioxide, etc. to purify pollutants in exhaust gases emitted from vehicles by photocatalytic reaction of the photocatalyst. Pollutant-originating matters as retained on the photocatalyst layer are washed away by rain water or sprinkled water. In one embodiment of the invention, road is a road provided with a dewaterable pavement and rain water passes through surface layer during raining, flows over and along base layer and is discharged. In surface layer , numerous aggregates of small particle sizes are projected from the entire surface of concrete layer . Titanium dioxide layer is formed by injecting or spraying a mixture comprising titanium dioxide, cement, a filler and water onto the entire surface of surface layer thinly and is water-permeable.