Method for permanently marking glass
US4781792A · kind A · utility
Inventor
Key dates
| Filing date | May 7, 1985 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | May 7, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB44C1/227
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for etching a glass surface employing a mask film comprising a porous support layer having a resist area impervious to a glass etchant composition and non-resist areas pervious to the glass etching composition. The glass surface to be etched is cleaned and wetted with a basic aqueous solution. The backside of the mask is applied to the wetted glass surface and squeeged thereon to form a film of the basic aqueous solution to detachably secure the mask to the glass surface. The glass etchant composition is applied to the face of the mask to cover all the non-resist areas to etch the underlying glass. After the glass has been etched to the desired degree, the mask together with substantially all of the glass etchant composition is removed from the glass surface. The surface of the glass is then washed with the aqueous basic solution to remove any residual glass etchant composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.