Polyurethane laminates for photochromic lenses
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Jul 1, 2004
app pub date -
Jul 30, 2003
filing date -
Jul 31, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A photochromic polyurethane laminate that is constructed to solve certain manufacturing difficulties involved in the production of photochromic lenses is disclosed. The photochromic laminate includes at least two layers of a transparent resinous material and a photochromic polyurethane layer that is interspersed between the two resinous layers and which contains photochromic compounds. The photochromic layer has a thickness of from 5 .mu.m to 80 .mu.m. The photochromic host material may be a thermoset or thermoplastic polyurethane. A laminate of this construction can be conveniently incorporated into a plastic lens through an insert injection molding process.
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