Expanded porous thermoplastic polymer membranes and device for the production thereof
US6808375B2 · kind B2 · utility
52Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2002 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Jul 21, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/917
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Open celled membranes from thermoplastic polymers are prepared from foamed polymer melts by extrusion through a die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.