Patent · US Expired

Polymer dye and method for producing the same and its use in light-emitting diodes and other optical components

US7288605B2 · kind B2 · utility

1Cited by

7References

9Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Hartmut Krueger · Bühl, DE
Bert Michael Fischer · Festus, US
Silvia Janietz · Stahnsdorf, DE
Armin Wedel · Mering, DE
Juergen Wahl · Linz, AT

Key dates

Filing date	Jul 11, 2002
Grant date	Oct 30, 2007
Priority date	—
Expiry date	Aug 4, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH10K85/141
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A method and apparatus for the removal of free, emulsified, or dissolved water from liquids of low volatility, such as oil, is shown. The liquid of low volatility is removed by contacting the fluid stream of concern with one side of a semi-permeable membrane. The membrane divides a separation chamber into a feed side into which the stream of fluid is fed, and a permeate side from which the water is removed. The permeate side of the chamber is maintained at a low partial pressure of water through presence of vacuum, or by use of a sweep gas.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.