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:
May. 21, 1991
Filed:
Nov. 22, 1989
Applicant:
Inventors:
Masaaki Otsuka, Yono, JP;
Masayuki Komiya, Yono, JP;
Naruhito Sawanobori, Yono, JP;
Shinobu Nagahama, Kasukabe, JP;
Assignee:
Sumita Optical Glass, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
501 44 ; 501902 ;
Abstract
A fluorophosphate optical glass having optical constants, i.e. a refractive index of 1.45 to 1.54 and an Abbe number of 75 to 90, preferably 75 to 89.5, useful as a lens for an optical instrument to obtain a good quality image, is provided, which has a chemical composition (% by mole) comprising:
Otsuka, Masaaki. (1991). Fluorosphosphate optical glass (U.S. Patent No. 5017520). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5017520
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile