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. 27, 2010
Filed:
Sep. 08, 2005
Applicants:
Yuji Kudo, Tokyo, JP;
Takeshi Iwasaki, Fujisawa, JP;
Inventors:
Yuji Kudo, Tokyo, JP;
Takeshi Iwasaki, Fujisawa, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection optical system provided with at least one of optical members made of a calcium fluoride single crystal,