发明授权
- 专利标题： Watch cover glass and process for the manufacture of such a glass
- 专利标题（中）： 钟表用护罩玻璃和处理这样的玻璃的制造
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申请号： US131792申请日： 1987-12-11
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公开(公告)号： US4849299A公开(公告)日： 1989-07-18
- 发明人: Eric Loth
- 申请人： Eric Loth
- 申请人地址： CHX Lengnau
- 专利权人： Montres Rado S.A.
- 当前专利权人： Montres Rado S.A.
- 当前专利权人地址： CHX Lengnau
- 主分类号： C30B33/00
- IPC分类号： C30B33/00 ; G04B39/00
摘要：
Sapphire watch cover glass or crystal.The glass or crystal (18) comprises on a part of its upper face, a superficial layer (28) having an amorphous structure. This layer (28) makes it possible to increase the hardness of the glass or crystal in its exposed parts while reducing the risk of breakage of said glass or crystal.