IP Library › Assignment 048360/0105
Patent Assignment
Reel/Frame 048360/0105

Change of Name

Recorded: 2019-02-18 Pages: 3
Assignor
Assignee
CNPC ENGINEERING TECHNOLOGY R&D 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
Application: 15/744,129 →
Publication: US 2018/0202267
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 14, 2019
From: CNPC DRILLING RESEARCH INSTITUTE
To: CNPC DRILLING RESEARCH INSTITUTE COMPANY LIMITED
Reel/Frame 048333/0345 →