Spheres obtained by vapor deposition for use in ball point pens
US4150905A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1977 |
| Grant date | Apr 24, 1979 |
| Priority date | — |
| Expiry date | Feb 9, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A sphere particularly suitable for ball point pens having a core capable of withstanding temperature in excess of 800.degree. C. and a chemically vapor deposited coating on the core, the combined diameter of core and coating ranging from approximately 0.5 to approximately 1 mm in diameter. For example, the core may consist of a metal such as tungsten, nickel, copper or molybdenum; or alternatively the core may consist of a ceramic such as aluminum oxide or graphite. The vapor deposited coating may consist of a metal carbide such as tungsten carbide, titanium carbide, tantalum carbide or niobium carbide. Alternatively the coating may consist of a metal boride such as titanium diboride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.