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公开(公告)号:US2274634A
公开(公告)日:1942-03-03
申请号:US35472940
申请日:1940-08-29
Applicant: STANDARD OIL CO
Inventor: LLEWELLYN HEARD
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公开(公告)号:US2252927A
公开(公告)日:1941-08-19
申请号:US26535639
申请日:1939-03-31
Applicant: STANDARD OIL CO
Inventor: LLEWELLYN HEARD , OBLAD ALEX G
IPC: C10L1/00
CPC classification number: C10L1/00
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公开(公告)号:US2193815A
公开(公告)日:1940-03-19
申请号:US17945237
申请日:1937-12-13
Applicant: STANDARD OIL CO
Inventor: LLEWELLYN HEARD
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