Patent Assignment
Reel/Frame 044605/0537
Assignment of Assignor's Interest
Recorded: 2018-01-12
Pages: 7
Assignors
XU, BINGGUI
Executed: 2017-12-25
YIN, HONGWEI
Executed: 2017-12-25
GUO, HUIJUAN
Executed: 2017-12-26
LIU, ZHITONG
Executed: 2017-12-25
LV, MINGJIE
Executed: 2017-12-25
WANG, JIANLI
Executed: 2017-12-25
LI, QIANG
Executed: 2017-12-26
KANG, PENG
Executed: 2017-12-26
JIA, TAO
Executed: 2017-12-25
WANG, XUE
Executed: 2017-12-25
TIAN, YI
Executed: 2017-12-25
WANG, AIGUO
Executed: 2017-12-25
Assignees
CHINA NATIONAL PETROLEUM CORPORATION
9 DONGZHIMEN NORTH STREET, DONGCHENG DISTRICT, BEIJING, CHINA
CNPC DRILLING RESEARCH INSTITUTE
A34 PLOTS, CHINA PETROLEUM INNOVATION BASE, XISHATUN BRIDGE WEST, SHAHE TOWN, CHANGPING DISTRICT, BEIJING, 102206, CHINA
Covered Property
(1)
Mechanical and Hydraulic Dual-Effect Expansion Device for Well Drilling with Expandable Tubular Technology
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name
Feb 14, 2019
From: CNPC DRILLING RESEARCH INSTITUTE
To: CNPC DRILLING RESEARCH INSTITUTE COMPANY LIMITED
Reel/Frame 048333/0345 →
Change of Name
Feb 18, 2019
From: CNPC DRILLING RESEARCH INSTITUTE COMPANY LIMITED
To: CNPC ENGINEERING TECHNOLOGY R&D COMPANY LIMITED
Reel/Frame 048360/0105 →