Heat treated stainless steel needles
US5533982A · kind A · utility
85Cited by
30References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1995 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Feb 15, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D1/773
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Surgical needles are produced from martensitic precipitation-hardening stainless steel and then vacuum heat treated and vacuum cooled to increase its tensile strength while retaining the polished surface of the needle. A needle made by this process is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.