Gas phase permeable filter
US4227904A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1978 |
| Grant date | Oct 14, 1980 |
| Priority date | — |
| Expiry date | Sep 8, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2275/105
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Described is a gas phase permeable filter and method for making same comprising the steps: PA1 1. Providing a gas phase permeable substrate having opposite surfaces; PA1 2. Applying an adhesive to one or both of the surfaces of the substrate; PA1 3. Applying particulate gas phase odor-removing means to the adhesive coated surface or surfaces of the substrate; PA1 4. Drying the adhesive; and PA1 5. Assembling the substrate in a desired filter configuration wherein the outer surface of the filter is a surface of the substrate free of particulate gas phase odor-removing means and the inner surface of the filter is a surface of the substrate coated with the particulate gas phase odor-removing means adhesively secured thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.