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. 12, 2023
Filed:
Jun. 03, 2021
Applicant:
Ngk Spark Plug Co., Ltd., Nagoya, JP;
Inventors:
Shohei Takaku, Nagoya, JP;
Hiroki Yamauchi, Nagoya, JP;
Shinji Ban, Nagoya, JP;
Hiroki Takeuchi, Nagoya, JP;
Assignee:
NGK SPARK PLUG CO., LTD., Nagoya, JP;
Primary Examiner:
Int. Cl.
CPC ...
F21V 13/00 (2006.01); F21V 13/08 (2006.01); F21V 9/40 (2018.01); F21V 29/83 (2015.01); F21V 7/05 (2006.01); F21V 3/08 (2018.01); F21Y 115/10 (2016.01); F21Y 115/30 (2016.01);
U.S. Cl.
CPC ...
F21V 13/08 (2013.01); F21V 3/08 (2018.02); F21V 7/05 (2013.01); F21V 9/40 (2018.02); F21V 29/83 (2015.01); F21Y 2115/10 (2016.08); F21Y 2115/30 (2016.08);
Abstract
A fluorescent plate including a fluorescent phase which emits fluorescence by excitation light, and a plurality of voids, wherein, in a cross section of the fluorescent plate including cross sections of the voids, voids having an equivalent circle diameter of 0.4 micrometers or greater and 50 micrometers or smaller have a standard deviation in equivalent circle diameter of 1.5 or less.