Patent Assignment
Reel/Frame 074390/0001
Assignment of Assignor's Interest
Recorded: 2026-04-16
Pages: 7
Assignors
HUANG, JIANGSHUI
Executed: 2020-10-14
ZHOU, NANCY
Executed: 2020-10-12
LIN, LIJUN
Executed: 2020-10-14
Assignee
CNPC USA CORPORATION
2901 WILCREST DRIVE, SUITE 600, HOUSTON, TEXAS, 77042
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: LIU, FUCHEN; WU, GUODONG; HUANG, BO
To: BEIJING HUAMEI INC.
Reel/Frame 074390/0139 →
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 →