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:
Apr. 18, 2000
Filed:
Apr. 29, 1998
Makoto Iwaki, Saitama, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A plastic lens is molded from a suitable transparent thermoplastic resin, and has a lens body and an annular portion integrally formed around the lens body. The annular portion has an annular surface, as a first positioning surface, extending perpendicularly from a peripheral outer edge of a lens surface of the lens body with respect to an optical axis of the lens body, and a peripheral cylindrical surface, as a second positioning surface, extending perpendicularly with respect to the first positioning surface. A right-angled annular corner, defined by an intersection of a hypothetical extension of the first positioning surface and a hypothetical extension of the second positioning surface, is eliminated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile