Method of making a gas phase permeable filter
US4699681A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1981 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Oct 5, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- 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.