Medical needle and cutting tool
US7662170B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2005 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Sep 1, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/00526
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A medical needle and the like that has small resistance when piercing, scraping or incising the body tissue, that is not easily bent and that reduces the reflection of the illumination as much as possible when in surgery performed under scope is provided. The medical needle and the like has a hardened layer, in which a carbon atom is penetrated, of a depth of 5 micrometers to 70 micrometers provided on a parent material surface of a fiber shape structure having an austenite stainless steel containing 1% to 6% of molybdenum or 13% to 25% of chromium. Further, after the hardened layer is provided, one part of the hardened layer is removed. Further, the dark layer is formed on the outer most surface of the hardened layer to provide a non-reflective surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.