Patent Assignment
Reel/Frame 054129/0830
Assignment of Assignor's Interest
Recorded: 2020-10-21
Pages: 7
Assignors
LIU, FUCHEN
Executed: 2020-10-12
WU, GUODONG
Executed: 2020-10-14
HUANG, BO
Executed: 2020-10-14
Assignee
BEIJING HUAMEI INC.
ROOM 2367, BUILDING 3, NO. 9, CHAO QIAN ROAD; CHANG PING DISTRICT, BEIJING, 102200, CHINA
Covered Property
(1)
Composition and Method for Improving the Production of Petroleum Hydrocarbons
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Oct 21, 2020
From: HUANG, JIANGSHUI; ZHOU, NANCY; LIN, LIJUN
To: CNPC USA CORPORATION
Reel/Frame 054129/0063 →
Assignment of Assignor's Interest
Dec 18, 2023
From: CNPC USA CORPORATION
To: CNPC USA CORPORATION; BEIJING HUAMEI, INC.; CHINA NATIONAL PETROLEUM CORPORATION
Reel/Frame 065900/0695 →
Assignment of Assignor's Interest
Dec 18, 2023
From: BEIJING HUAMEI, INC.
To: CNPC USA CORPORATION; BEIJING HUAMEI, INC.; CHINA NATIONAL PETROLEUM CORPORATION
Reel/Frame 065900/0746 →