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:
Dec. 15, 2020
Filed:
Jan. 09, 2020
Applicant:
Ngk Insulators, Ltd., Nagoya, JP;
Inventors:
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21K 9/66 (2016.01); F21K 9/235 (2016.01); C03C 3/06 (2006.01);
U.S. Cl.
CPC ...
F21K 9/66 (2016.08); C03C 3/06 (2013.01); F21K 9/235 (2016.08);
Abstract
A transparent sealing member is provided with minute recesses at least in the surface of the member from which light from an optical element is emitted. The average width of the minute recesses is 0.1 μm to 2.0 μm, the average depth of the minute recesses is 5 nm to 50 nm, and the average frequency of occurrence of the minute recesses is 100000 to 3000000 recesses per 1 mm.