Progressive lens apparatus and process
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 17, 2003
Grant Date -
Jun 20, 2002
app pub date -
Jul 25, 2001
filing date -
Aug 18, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A progressive lens mold, a method of making a progressive lens mold, and progressive lenses made using such mold or method. Back faces of progressive molds are preferentially tapered at their edges to reduce prism effects in lenses made using such molds. The tapering is accomplished by removing more of the back face adjacent the near portion vision zone of the mold versus the back face adjacent to the far vision zone of the molds.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully