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. 22, 2008
Filed:
Nov. 17, 2005
Applicant:
Yuhei Sumiyoshi, Utsunomiya, JP;
Inventor:
Yuhei Sumiyoshi, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 27/42 (2006.01); G03B 27/54 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection optical system used for an exposure apparatus to projecting a reduced size of an image of an object onto an image plane includes plural refractive elements that dispense with a reflective element having a substantial optical power, wherein the projection optical system forms an intermediate image.
Sumiyoshi, Yuhei. (2008). Projection optical system and exposure apparatus having the same (U.S. Patent No. 7403262). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7403262
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