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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.:

US 12454463 B1

PDFFull Text
Date of Patent:
Oct. 28, 2025

Filed:

Dec. 24, 2019

Alumina, alumina slurry, alumina film, laminate separator, nonaqueous electrolyte secondary battery and manufacturing method thereof

Applicant:

Sumitomo Chemical Company, Limited, Tokyo, JP;

Inventors:

Hirotaka Ozaki, Niihama, JP;

Toyohisa Uda, Niihama, JP;

Hiroyuki Ando, Niihama, JP;

Assignee:

SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;

Attorney:

Foley & Lardner LLP

Primary Examiner:

Anthony J Zimmer

Assistant Examiner:

Zachary John Baum

Int. Cl.
CPC ...
C01F 7/02 (2022.01); H01M 50/431 (2021.01); H01M 50/443 (2021.01); H01M 50/449 (2021.01);
U.S. Cl.
CPC ...
C01F 7/02 (2013.01); H01M 50/431 (2021.01); H01M 50/443 (2021.01); H01M 50/449 (2021.01); C01P 2004/51 (2013.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01);
Abstract

Disclosed is alumina having a water desorption index H (=(V−V)÷V) of 0.15 or less in a water adsorption/desorption isotherm at 25° C., where Vrepresents a water adsorption amount [mg/g] per 1 g of alumina in the desorption isotherm at a relative water vapor pressure of 0.5, Vrepresents a water adsorption amount [mg/g] per 1 g of alumina in the adsorption isotherm at a relative water vapor pressure of 0.5, and Vrepresents a water adsorption amount [mg/g] per 1 g of alumina in the adsorption isotherm at a relative water vapor pressure of 0.9.

Find Patent Forward Citations

Ozaki, Hirotaka. (2025). Alumina, alumina slurry, alumina film, laminate separator, nonaqueous electrolyte secondary battery and manufacturing method thereof (U.S. Patent No. 12454463). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12454463

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