Patent Assignment
Reel/Frame 052668/0458
Assignment of Assignor's Interest
Recorded: 2020-05-14
Pages: 5
Assignors
LIU, YONGWANG
Executed: 2020-04-26
GUAN, ZHICHUAN
Executed: 2020-04-26
SHI, YUCAI
Executed: 2020-04-25
LIAO, HUALIN
Executed: 2020-04-25
GUAN, BEN
Executed: 2020-04-25
Assignee
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
NO. 66, CHANGJIANG WEST ROAD, HUANGDAO DISTRICT,, SHANDONG, QINGDAO, 266000, CHINA
Covered Property
(1)
Depressuriz Od for Downhole Annulus Drilling Fluid