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:
Aug. 25, 1998
Filed:
Jan. 27, 1997
Applicant:
Inventors:
Richard R Martin, Westford, MA (US);
Michael Vayntraub, North Andover, MA (US);
Assignee:
Polymer Technology Corporation, Wilmington, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
3511 / ;
Abstract
Multispheric contact lenses have a posterior surface including a central, concave spherical optical zone and at least two concave spherical curves peripheral to the central concave optical zone. The lens includes a fillet convex curve connecting the central zone and the first peripheral curve, and fillet convex curves connecting adjacent peripheral concave curves, wherein each junction of a fillet convex curve with a concave spherical curve is tangential. The lenses have an anterior surface including one or more convex spherical curves.