Patent · US Active

Multi-layer coated porous materials and methods of making the same

US7507469B2 · kind B2 · utility

35Cited by

27References

9Claims

0Family size

Assignee

Porex Corporation · US

Inventors

Guoqiang Mao · Smyrna, US
George Greene · Peachtree City, US
Li Yao · Tianjin, CN

Key dates

Filing date	Aug 18, 2006
Grant date	Mar 24, 2009
Priority date	—
Expiry date	Aug 18, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/249993
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Multi-layer coated materials and methods of making them are disclosed. In a specific embodiment, a porous polymeric substrate is pre-activated and immersed in a polyelectrolyte solution to form a first layer having an electric charge and at least one functional group. The coated material is next immersed in a second solution of a material having an electric charge opposite of that of the first layer to provide a bi-layer coating. This process can be repeated to form multi-layer coatings on porous substrates.

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