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. 16, 2019
Filed:
Jan. 20, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Susumu Abe, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical element includes a lens base and an antireflection film arranged on a surface of the lens base. The antireflection film includes a multilayer film including a layer formed of a silicon oxide film and a layer formed of a tantalum oxide film, the layer formed of the silicon oxide film and the layer formed of the tantalum oxide film being stacked. The antireflection film further includes an inner layer arranged on a surface of the multilayer film, the inner layer being formed of a magnesium fluoride film, and an outer layer arranged on a surface of the inner layer, the outer layer being formed of a silicon oxide film.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile