Patent Assignment
Reel/Frame 074390/0139
Assignment of Assignor's Interest
Recorded: 2026-04-16
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 B, BUILDING 3, CAOQIAN ROAD, SCIENCE PARK, CHANGPING DISTRICT, BEIJING, 102200, CHINA
Covered Property
(1)
Composition and Method for Improving the Production of Petroleum Hydrocarbons
Application:
19/230,783 →
Publication:
US 2025/0297154
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Apr 16, 2026
From: BEIJING HUAMEI, INC.
To: CNPC USA CORPORATION; BEIJING HUAMEI, INC.; CHINA NATIONAL PETROLEUM CORPORATION
Reel/Frame 074390/0244 →
Assignment of Assignor's Interest
Apr 16, 2026
From: CNPC USA CORPORATION
To: CNPC USA CORPORATION; BEIJING HUAMEI, INC.; CHINA NATIONAL PETROLEUM CORPORATION
Reel/Frame 074390/0210 →
Assignment of Assignor's Interest
Apr 16, 2026
From: HUANG, JIANGSHUI; ZHOU, NANCY; LIN, LIJUN
To: CNPC USA CORPORATION
Reel/Frame 074390/0001 →