Method for applying a catalyst composition to the interior of a hollow substrate
US7374792B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2002 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Feb 27, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C11/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A catalyst composition is applied to an interior of a hollow substrate. The composition is coated on the substrate by immersing the substrate into a vessel containing a bath of coating slurry. A vacuum is then applied to the partially immersed substrate. The intensity of the vacuum and its application time is sufficient to draw the coating slurry upwardly from the bath into each of a plurality of channels located in the interior of the hollow substrate. After removing the substrate from the bath it is rotated 180°. A blast of pressurized air is applied at an intensity and for a time sufficient to distribute the coating slurry within the channels of the substrate to form a uniform coating profile therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.