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公开(公告)号：CA384808A
公开(公告)日：1939-10-24
申请号：CA384808D
Applicant: STANDARD OIL CO
Inventor： GERHART HOWARD L , HULL CARL MAX
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公开(公告)号：CA449542A
公开(公告)日：1948-06-29
申请号：CA449542D
Applicant: STANDARD OIL CO
Inventor： THIELE ERNEST W , SCHMITKONS GEORGE E , HULL CARL MAX
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