IP Library › Assignment 049067/0836
Patent Assignment
Reel/Frame 049067/0836

Change of Name

Recorded: 2019-05-02 Pages: 4
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)
Cementing Plug
Application: 15/864,716 →
Publication: US 2018/0313186
Related Assignments (2)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Jan 8, 2018
From: ZHANG, HONGYING; WANG, NA; HUANG, YANFU; SHI, LIN
To: CHINA NATIONAL PETROLEUM CORPORATION; CNPC DRILLING RESEARCH INSTITUTE; BEIJING PETROLEUM MACHINERY CO.
Reel/Frame 044564/0330 →
Change of Name Apr 30, 2019
From: CNPC DRILLING RESEARCH INSTITUTE
To: CNPC DRILLING RESEARCH INSTITUTE COMPANY LIMITED
Reel/Frame 049032/0496 →