Double-layered balloon envelope
US9475567B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 2013 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Feb 24, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1383
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A balloon envelope, having a base layer of ethylene vinyl alcohol (EVOH) and a layer of a second material, that is not EVOH, bonded to at least a portion of an outer-facing surface of the EVOH layer, is provided. The second material may be polyethylene, or a biaxially-oriented polyethylene terephthalate, such as Mylar®. The envelope may also be provided with another layer of the second material bonded to at least a portion of an inner-facing surface of the EVOH layer. The combination of the EVOH layer and the layer of the second material may be less gas-permeable than the EVOH layer alone and the layer of the second material alone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.