Biological implants of semipermeable amphiphilic membranes
US6200589A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1998 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Feb 27, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L31/048
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An implantable biological device including a semipermeable membrane formed into a geometric shape capable of encapsulating biological cells and capable of immunoisolating the biological cells upon introduction into the body, the semipermeable membrane including an amphiphilic copolymer network having hydrophobic segments and hydrophilic segments, wherein the hydrophobic segments include polyolefins terminated with radicals selected from the group consisting of acryloyl groups, methacryloyl groups and mixtures thereof and wherein the hydrophilic segments include polyacrylates. Also provided is a method of encapsulating and immunoisolating cells using the semipermeable membrane and method of treating ailments using the implantable biological device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.