Patent · US Active

Surface treated shape memory materials and methods for making same

US7803234B2 · kind B2 · utility

1Cited by

0References

25Claims

0Family size

Assignees

Versitech Limited · CN
CITY UNIVERSITY OF HONG KONG · CN

Inventors

Kelvin Yeung · Sha Tin, CN
Ray W. Y. Poon · Kowloon, CN
Paul K. Chu · Kowloon, CN
Kenneth Cheung · Sha Tin, CN
William Lu · Hong Kong, CN

Key dates

Filing date	Jan 11, 2006
Grant date	Sep 28, 2010
Priority date	—
Expiry date	Mar 5, 2027

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61L2400/18
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention provides a method for making surface treated shape memory materials such as from NiTi alloy using plasma immersion ion implantation and deposition and related ion-beam and plasma-based techniques to alter the surface properties of those materials primarily for biomedical applications. The surfaces are treated with nitrogen, oxygen, and carbon, but become bio-inactive after implanted with other elements such as silicon.

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