Watch case
US4155782A · kind A · utility
6Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1976 |
| Grant date | May 22, 1979 |
| Priority date | — |
| Expiry date | Nov 9, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B37/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A watch case made of an alloy consisting essentially of 30 to 45% by weight of Cr, 2.5 to 5.0% by weight of Al and the balance essentially Ni, said alloy having been subjected to an aging treatment. The watch case is high in hardness and corrosion resistance and presents a good mirror-like surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.