| Title of Invention | " A METHOD OF CLEANING THE SURFACE OF A SUBSTRATE" |
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| Abstract | A method for cleaning the surface of a substrate, comprising the steps of: providing a substrate of the kind as herein described coated with a layer containing a photocatalyst wherein the photocatalyst is a metal oxide such as herein described and optionally a solid material wherein the solid material is either a solid acid or a solid base of the kind as herein described; photoexciting the photocatalyst to enhance a hydrogen bond component (YSH) in the surface energy in the solid/gas interface of said layer under the photocatalytic action of said photocatalyst, thereby enhancing the oil repellency of the surface of a substrate in water; and immersing the substrate in water or wetting the substrate with water to release an oil stain adhering on the surface of the substrate. |
| Full Text | DESCRIPTION (COMPLETE) OCR NOT PREPARE DUE TO PRINT PROBLEM WE CLAIM: 1. A method for cleaning the surface of a substrate, comprising the steps of: providing a substrate of the kind as herein described coated with a layer containing a photocatalyst wherein the photocatalyst is a metal oxide such as herein described and optionally a solid material wherein the solid material is either a solid acid or a solid base of the kind as herein described; photoexciting the photocatalyst to enhance a hydrogen bond component (YSH) in the surface energy in the solid/gas interface of said layer under the photocatalytic action of said photocatalyst, thereby enhancing the oil repellency of the surface of a substrate in water; and immersing the substrate in water or wetting the substrate with water to release an oil stain adhering on the surface of the substrate. 2. The method as claimed in claim 1, wherein the metal oxide is selected from ZnO, SNO2, SiTiC3, WO3, B12O3, Fe203 and Ti02. 3. The method as claimed in claim 1, wherein the solid acid is a metal oxide bearing sulfuric acid. 4. The method as claimed in claim 1, wherein the solid acid is a metal oxide bearing nitric acid. 5. The method as claimed in claim 1, wherein the solid acid is a compound oxide of metals. 6. The method as claimed in claim 5, wherein the compound oxide of metals is an oxide superstrong acid. 7. The method as claimed in claim 5, wherein the compound oxide of metal is selected from TiO2/W03, WO3/ZrO2, and W03/Sn02. 8. The method as claimed in claim 1, wherein the solid acid is AI2O3, Si02. |
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622-del-2005-claims cancelled.pdf
622-del-2005-complete specification (granted).pdf
622-DEL-2005-Correspondence-Others-(10-12-2009).pdf
622-del-2005-correspondence-others.pdf
622-del-2005-correspondence-po.pdf
622-del-2005-descreption (complete).pdf
622-DEL-2005-Form-3-(10-12-2009).pdf
| Patent Number | 238504 | ||||||||||||||||||||||||
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| Indian Patent Application Number | 622/DEL/2005 | ||||||||||||||||||||||||
| PG Journal Number | 8/2010 | ||||||||||||||||||||||||
| Publication Date | 19-Feb-2010 | ||||||||||||||||||||||||
| Grant Date | 08-Feb-2010 | ||||||||||||||||||||||||
| Date of Filing | 22-Mar-2005 | ||||||||||||||||||||||||
| Name of Patentee | TOTO LTD., | ||||||||||||||||||||||||
| Applicant Address | 1-1 NAKAJIMA 2-CHOME, KOKURA-KITA-KU, KITAKYUSHU-SHI, FUKUKO-KEN,JAPAN | ||||||||||||||||||||||||
Inventors:
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| PCT International Classification Number | B08B 3/00 | ||||||||||||||||||||||||
| PCT International Application Number | N/A | ||||||||||||||||||||||||
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PCT Conventions:
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