The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2026
Filed:
Apr. 13, 2023
Changzhou University, Changzhou, CN;
Jiajia Bai, Changzhou, CN;
Lei Tao, Changzhou, CN;
Wenyang Shi, Changzhou, CN;
Na Zhang, Changzhou, CN;
Zhengxiao Xu, Changzhou, CN;
Qingjie Zhu, Changzhou, CN;
Yunpeng MA, Changzhou, CN;
Mingzhu Liu, Changzhou, CN;
Shuanghu Si, Changzhou, CN;
Zhu Ren, Changzhou, CN;
Tianshuai Gu, Changzhou, CN;
Haichi Shang, Changzhou, CN;
Yahu Liu, Changzhou, CN;
Yaxuan Zhang, Changzhou, CN;
Yueyang Wang, Changzhou, CN;
Changzhou University, Changzhou, CN;
Abstract
The present invention provides a method of preparing a surfactant for improving the recovery rate of oil reservoirs in a low-permeability sandstone, including two steps of preparing a deep-eutectic solvent and preparing a surfactant. The surfactant of the present invention significantly reduces the interfacial tension between oil and water and has the effect of inhibiting the hydration expansion of clay minerals.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile