IP Library › Granted Patent US 6,943,221
Granted Patent B2
US 6,943,221 · App. 10/642,922 · Granted Sep 13, 2005

High refractive index thermoplastic polyphosphonates

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Quick Facts
Patent No.
US 6,943,221
App. No.
10/642,922
Granted
Sep 13, 2005
Kind
B2
Abstract

High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.

Claims (10)

1. A phosphonate copolymer comprising

(a) a first unit having the formula

wherein R 16 , R 17 , and R 18 are independently O or S; R 19 is phenyl; and R 20 is

(b) a second unit having the formula

wherein R 21 , R 22 , and R 23 are independently O or S; R 24 is phenyl; and R 25 is

2. An optical or ophthalmic lens, said lens comprising a melt-processable phosphonate copolymer comprising

(a) a first unit having the formula

wherein R 16 , R 17 , and R 18 are independently O or S; R 19 is phenyl; and R 20 is

(b) a second unit having the formula

wherein R 21 , R 22 , and R 23 are independently O or S; R 24 is phenyl; and R 25 is

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 6, 2006
From: JOHNSON & JOHNSON VISION CARE, INC.
To: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
Reel/Frame 017314/0505 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 18, 2003
From: JOHNSON & JOHNSON VISION PRODUCTS, INC.
To: JOHNSON & JOHNSON VISION CARE, INC.
Reel/Frame 014551/0907 →