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:
Feb. 04, 2003
Filed:
May. 02, 2000
Toshihiro Kasai, Sagamihara, JP;
Kenton D. Budd, Woodbury, MN (US);
Stephen L. Lieder, Wyoming, MN (US);
James A. Laird, Hudson, WI (US);
Chikafumi Yokoyama, Kawasaki, JP;
Toshinori Naruse, Sagamihara, JP;
Kenji Matsumoto, Kawasaki, JP;
Hirohiko Ono, Tokyo, JP;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Transparent solid, fused microspheres are provided. In one embodiment, the microspheres contain alumina, zirconia, and silica in a total content of at least about 70% by weight, based on the total weight of the solid, fused microspheres, wherein the total content of alumina and zirconia is greater than the content of silica, and further wherein the microspheres have an index of refraction of at least about 1.6 and are useful as lens elements.