MUMBAI, India, Sept. 13 -- Intellectual Property India has published a patent application (202317067537 A) filed by Celgard, Llc; and Asahi Kasei Kabushiki Kaisha, Charlotte, U.S.A., on Oct. 9, 2023, for 'separator for electric storage device and electric storage device.'

Inventor(s) include Hamasaki, Shinya; Azami, Yoko; Takahashi, Masaki; Yoshida, Hirotaka; and Takeda, Hisashi.

The application for the patent was published on Sept. 13, under issue no. 37/2024.

According to the abstract released by the Intellectual Property India: "The present disclosure provides a separator for an electric storage device, which separator is capable of reducing clogging and has an excellent thermal stability, and an electric storage device using the same. The above-described separator for an electric storage device includes a microporous layer (A) and a microporous layer (B) that contain 70 wt% or more of polypropylene, and the area average major pore diameter in an ND-MD cross section of the microporous layer (B) is not more than 0.95 times the area average major pore diameter in an ND-MD cross section of the microporous layer (A). Alternatively, the separator for an electric storage device contains 70% by weight or more of a polyolefin, and the area average major pore diameter of a first porous surface (X) of the separator is not less than 1.05 times and not more than 10 times the area average major pore diameter of a second porous surface (Y) on the side opposite thereto."

The patent application was internationally filed on Mar. 14, 2022, under International application No.PCT/US2022/020154.

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