Oil-and water repellent gas-permeable filter
US5462586A · kind A · utility
78Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1994 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Sep 7, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2307/7265
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An oil- and water-repellent filter which contains a porous filter material that has its internal and external surfaces coated with a compound formed by combining a fluoropolymer having a fluorine-containing aliphatic cyclic structure in the main chain and a fluoropolymer containing polyfluoroalkyl groups. The coating imparts superior oil- and water-repellency without impairment to the flow of air or other gases through the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.