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:
Sep. 16, 2025
Filed:
Feb. 24, 2021
Osaka Gas Chemicals Co., Ltd., Osaka, JP;
Yuki Ouchi, Osaka, JP;
OSAKA GAS CHEMICALS CO., LTD., Osaka, JP;
Abstract
The fluorene derivative of the present disclosure is represented by the following formula (1): Wherein Rrepresents a substituent, k denotes an integer of 0 to 8, R, R, R, and Reach represent a hydrogen atom or a substituent, Rand Reach represent a hydrogen atom or a substituent, and Xand Xeach represent a group defined in the following formula (X1): wherein Rand Reach represent a hydrogen atom or an aliphatic hydrocarbon group, provided that the case where both Rand Rare a hydrogen atom is excluded; or Rand Rbond together to form a heterocyclic ring containing the nitrogen atom adjacent to Rand R. The present disclosure provides a novel fluorene derivative useful as an additive for improving the properties of a resin, a method for producing the same and a use thereof.