Catheter tubing of controlled in vivo softening
US5226899A · kind A · utility
230Cited by
24References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Aug 15, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7542
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A catheter tubing has a layer of a hydrophobic stiffening polymer encapsulated by a layer of hydrophilic thermoplastic base polymer. Preferred stiffening polymers are polyesterpolyether block copolymers. Preferred base polymers are thermoplastic polyetherurethanes. The encapsulated layer may be a stripe or an annular layer having base polymer layers laminated on both surfaces thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.