Patent Assignment
Reel/Frame 048333/0345
Change of Name
Recorded: 2019-02-14
Pages: 3
Assignor
CNPC DRILLING RESEARCH INSTITUTE
Executed: 2017-11-24
Assignee
CNPC DRILLING RESEARCH INSTITUTE COMPANY LIMITED
NO.1 BUILDING, NO.5 COURTYARD,, HUANGHE STREET, 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.
Assignment of Assignor's Interest
Jan 12, 2018
From: XU, BINGGUI; YIN, HONGWEI; GUO, HUIJUAN; LIU, ZHITONG
To: CHINA NATIONAL PETROLEUM CORPORATION; CNPC DRILLING RESEARCH INSTITUTE
Reel/Frame 044605/0537 →
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 →