Nickel titanium martensitic steel for surgical needles
US5000912A · kind A · utility
54Cited by
4References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1989 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Dec 15, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2210/0019
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A needle alloy wherein the nickel content is between 6.3% and 9.5%, the chromium content is between 11.5% and 12.5% and the molydenum content is between 3% and 4%. In addition, tantalum and titanium should be present at a combined level of no more than 2.1%. Favorable results from this alloy cause needles to have a greater than 400,000 psi ultimate tensile strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.