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公开(公告)号：US2440009A
公开(公告)日：1948-04-20
申请号：US36173640
申请日：1940-10-18
Applicant: THERMOID COMPANY
Inventor： GRAHAM ADELBERT M
IPC: E21B17/12
CPC classification number: E21B17/12 , Y10T29/53665
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公开(公告)号：US2433042A
公开(公告)日：1947-12-23
申请号：US52728344
申请日：1944-03-20
Applicant: THERMOID COMPANY
Inventor： GRAHAM ADELBERT M
CPC classification number: E21B17/1042 , B29C33/68 , B29C43/24 , B29C43/32 , B29C53/562 , B29C61/006 , B29C69/002 , B29C69/003 , B29K2021/00 , B29K2105/246
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