Pyrocarbon and process for depositing pyrocarbon coatings
US5677061A · kind A · utility
18Cited by
30References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Jan 16, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Pure unalloyed pyrocarbons having wear resistance suitable for use in pyrocarbon-coated heart valve components and having mechanical properties, such as flexural strength and toughness, superior to commercial silicon-alloyed pyrocarbons are deposited in fluidized bed coaters. Coating conditions are carefully controlled so as to maintain a precise bed size within a defined coating enclosure which will assure a substantially constant surface deposition temperature that in turn assures deposition of homogenous unalloyed pyrocarbons having these improved mechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.