PETROLEUM WELL THERMALLY ACTIVATED SAFETY RELIEF DEVICE FOR DIFFERENTIAL PRESSURE CLOSING TUBING SAFETY VALVE,申请号USD3450202-传众专利搜索

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发明名称	PETROLEUM WELL THERMALLY ACTIVATED SAFETY RELIEF DEVICE FOR DIFFERENTIAL PRESSURE CLOSING TUBING SAFETY VALVE
摘要
申请公布号	US3450202(A)	申请公布日期	1969.06.17
申请号	USD3450202	申请日期	1968.01.25
申请人	GRAY TOOL CO.	发明人	JOHN SLACK
分类号	E21B35/00;(IPC1-7):E21B35/00;F16K17/40	主分类号	E21B35/00
代理机构		代理人
主权项
地址

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