发明授权
- 专利标题: Electrical heater
- 专利标题(中): 电加热器
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申请号: US09264436申请日: 1999-03-08
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公开(公告)号: US06269876B1公开(公告)日: 2001-08-07
- 发明人: Eric De Rouffignac , Harold J. Vinegar , Lawrence James Bielamowicz
- 申请人: Eric De Rouffignac , Harold J. Vinegar , Lawrence James Bielamowicz
- 主分类号: E21B3604
- IPC分类号: E21B3604
摘要:
A heater is disclosed, the heater including: a porous metal sheet heating element; and an electrical insulating material surrounding the porous metal sheet heating element; wherein there is no casing surrounding the porous metal sheet heating element.