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. 04, 2025
Filed:
Sep. 13, 2021
Mitsubishi Chemical Corporation, Tokyo, JP;
Kei Uchiyama, Tokyo, JP;
Masashi Yokogi, Tokyo, JP;
Hiroki Shibata, Tokyo, JP;
Sora Tomita, Tokyo, JP;
Yuichi Yayama, Tokyo, JP;
Kenji Tsuruhara, Tokyo, JP;
Takayuki Yoshida, Tokyo, JP;
Yukie Nakashima, Tokyo, JP;
Rie Konishi, Tokyo, JP;
Kazuo Hirowatari, Tokyo, JP;
MITSUBISHI CHEMICAL CORPORATION, Tokyo, JP;
Abstract
A bisphenol composition including 95% or more by mass of a bisphenol, wherein a bisphenol represented by the following general formula (II) in the bisphenol composition constitutes 150 mass ppm or more, and the bisphenol composition has a methanol dissolution color (Hazen color number) of 2 or less, In formula (II), X denotes a single bond, —CRR—, —O—, —CO—, —S—, —SO—, or —SO—, Rand Rindependently denote a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and Rand Rmay be bonded to each other to form a ring. A method for producing a polycarbonate resin using the bisphenol composition is also described.