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:
Jul. 20, 2021
Filed:
Jan. 25, 2017
Applicant:
Nissan Chemical Industries, Ltd., Tokyo, JP;
Inventors:
Tadayuki Isaji, Funabashi, JP;
Naoki Otani, Funabashi, JP;
Shinichi Maeda, Funabashi, JP;
Masahiro Ueda, Kyoto, JP;
Takayoshi Kawasaki, Kyoto, JP;
Assignee:
NISSAN CHEMICAL INDUSTRIES, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/65 (2006.01); C01B 32/184 (2017.01);
U.S. Cl.
CPC ...
C09K 11/65 (2013.01); C01B 32/184 (2017.08); C01B 2204/20 (2013.01);
Abstract
Provided is a production method for a carbon-based light-emitting material that generates light having a wavelength of 500 to 700 nm when exposed to excitation light having a wavelength of 300 to 600 nm. The production method comprises a step for mixing and heating a starting material containing ascorbic acid, an acid catalyst containing an inorganic acid, and a solvent.