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. 20, 1993
Filed:
Aug. 08, 1990
Applicant:
Inventors:
John A Futhey, St. Paul, MN (US);
Michael J Simpson, St. Paul, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, Saint Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
G02C / ; G02B / ; A61F / ;
U.S. Cl.
CPC ...
351161 ; 351168 ; 359565 ; 359570 ; 359571 ; 623-6 ;
Abstract
A lens according to the invention has diffractive power and two primary foci, where one focus is associated with the first diffractive order and one with the second diffractive order.
Published as:
CA2048013A1; EP0470811A2; AU8131991A; EP0470811A3; JPH04254817A; US5229797A; AU657094B2; EP0470811B1; DE69127734D1; ES2106766T3; DE69127734T2; DK0470811T3; CA2048013C; JP3294291B2;
Futhey, John. (1993). Multifocal diffractive ophthalmic lenses (U.S. Patent No. 5229797). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5229797
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile