Patent search ap:("CITIES SERVICE OIL CO") AND inv:"HELLINGS RICHARD E" Page 1

1.

发明授权
Method for inhibiting the evaporation of volatile materials 失效
Title translation: 抑制挥发性物质蒸发的方法

公开(公告)号：US3421838A

公开(公告)日：1969-01-14

申请号：US3421838D

申请日：1966-01-14

Applicant: CITIES SERVICE OIL CO

Inventor： HELLINGS RICHARD E

IPC: B01J19/16 , C10L1/00 , C10C3/00

CPC classification number: B01J19/16 , C10L1/006

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