Patent Assignment
Reel/Frame 075415/0829
Assignment of Assignor's Interest
Recorded: 2026-04-20
Pages: 3
Assignor
CARBON NANO ENGINEERING SYSTEMS CO., LTD.
Executed: 2026-04-14
Assignee
HUNAN YUANCHANG NEW MATERIAL TECHNOLOGY CO., LTD.
601, BUILDING 5, PHASE 1 FACTORY OF CENTRAL INTELLIGENCE VALLEY, NO. 189, SECTION 2, RENMIN EAST ROAD, CHANGSHA ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE, CHANGSHA CITY, HUNAN PROVINCE, 410100, CHINA
Covered Property
(1)
Preparation method for graphene quantum dots with different oxygen contents, graphene quantum dot, and fluorescent material
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Jan 15, 2018
From: ZHANG, LINDE; ZHANG, MINGDONG
To: ZHANG, LINDE
Reel/Frame 045073/0420 →
Assignment of Assignor's Interest
Apr 14, 2022
From: ZHANG, LINDE
To: HUBEI HIGHLAND GRAPHENE TECHNOLOGY CO., LTD.
Reel/Frame 059605/0354 →
Assignment of Assignor's Interest
Aug 1, 2025
From: HUBEI HIGHLAND GRAPHENE TECHNOLOGY CO., LTD.
To: CARBON NANO ENGINEERING SYSTEMS CO., LTD.
Reel/Frame 071904/0322 →