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. 14, 1992
Filed:
Nov. 21, 1989
Applicant:
Inventors:
John A Futhey, Petaluma, CA (US);
William B Isaacson, Stanley, ND (US);
Michael J Simpson, Maplewood, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, Saint Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
G02C / ; G02C / ; G02B / ;
U.S. Cl.
CPC ...
351161 ; 351172 ; 359565 ; 359570 ; 359571 ; 359575 ; 623-6 ;
Abstract
An ophthalmic lens exhibiting diffractive power has a plurality of diffractive zones and smooth surfaces. The zones are arranged such that R.sub.0.sup.2 does not equal R.sub.1.sup.2 -R.sub.0.sup.2 where R.sub.0 is the radius of the central zone and R.sub.1 is the radius of the first annular zone.
Futhey, John. (1992). Multi-focal diffractive ophthalmic lenses (U.S. Patent No. 5129718). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5129718
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile