Process for forming porous polymeric product from a nonporous polymeric composition and product
US5277811A · kind A · utility
12Cited by
10References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1992 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | Apr 14, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2323/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A product having a porous polymeric structure is formed from a non-porous polymeric sheet by sequential contact of the non-porous sheet with a solvent for the sheet and then a non-solvent for the sheet. The porous product can be porous through all or a portion of its thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.