Patent US4636212A successfully refreshed from Google Patents.
US4636212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet radiation absorbing intraocular lens
Assignee: Optical Radiation Corp
•
Filing: 1985-03-18
•
Granted: 1987-01-13
•
Expires: 2005-03-18
Abstract
Abstract An intraocular lens capable of absorbing ultraviolet radiation and, additionally, a method for forming the lens is provided. The intraocular lens comprises a polymer matrix that is biocompatible with body tissue and fluids and comprises polymethylmethacrylate and a chromophoric compound. The intraocular lens preferably has about the same capability for absorbing ultraviolet radiation as does the natural crystalline lens of the eye. In one embodiment, the intraocular lens is formed by co-polymerizing a polymerizable derivate of 2,4-dihydroxybenzophenone and methyl methacrylate monomer to form an ultraviolet light absorbing co-polymer additive. The co-polymer additive is mixed with methyl methacrylate monomer for forming a prepolymer solution that is then cured. The intraocular lens is formed from the solid cured co-polymer.
Inventors
- 👤 Thomas Posin
- 👤 Daniel D. Lawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:00
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61L; A61L27/00; A61L27/14; A61L27/16; A61L27/50; A61F2002/16965; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098; A61L2430/00; A61L2430/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
77 words
A method for forming an intraocular lens comprising the steps of: (a) co-polymerizing a polymerizable derivative of dihydroxybenzophenone and methyl methacrylate monomer to form a solid ultraviolet radiation absorbing co-polymer additive; (b) dissolving the ultraviolet radiation absorbing co-polymer additive in methyl methacrylate monomer to thereby form a prepolymer solution; (c) curing the prepolymer solution in a mold to thereby form an intraocular lens comprising the ultraviolet radiation absorbing co-polymer additive physically trapped within a polymethylmethacrylate polymer matrix.
Claim 2
Independent Claim
77 words
A method for forming an intraocular lens comprising the steps of: (a) co-polymerizing a polymerizable derivative of dihydroxybenzophenone and methyl methacrylate monomer to form a solid ultraviolet radiation absorbing co-polymer additive; (b) dissolving the ultraviolet radiation absorbing co-polymer additive in methyl methacrylate monomer to thereby form a prepolymer solution; (c) curing the prepolymer solution in a mold to thereby form an intraocular lens comprising the ultraviolet radiation absorbing co-polymer additive physically trapped within a polymethylmethacrylate polymer matrix.
Claim 3
Dependent Claim
15 words
The method according to claim 1 wherein the polymerizable derivative is a derivative of 2,4-dihydroxybenzophenone.
Claim 4
Dependent Claim
24 words
The method according to claim 2 wherein the solid co-polymer additive comprises less than about 15% by weight of the polymerizable derivative of 2,4-dihydroxybenzophenone.
Claim 5
Dependent Claim
29 words
The method according to claim 2 wherein the derivative of 2,4-dihydroxybenzophenone comprises between about four percent and about five percent by weight of the total weight of the lens.
Claim 6
Dependent Claim
96 words
An intraocular lens for implantation into the human eye comprising an ultraviolet radiation absorbing co-polymer physically trapped within a polymethylmethacrylate polymer matrix, said lens being formed by the steps of: (a) co-polymerizing a polymerizable derivative of dihydroxybenzophenone with methyl methacrylate monomer to thereby form an ultraviolet radiation absorbing co-polymer additive; (b) dissolving the ultraviolet radiation absorbing co-polymer additive in methyl methacrylate monomer to thereby form a prepolymer solution; (c) curing the prepolymer solution in a mold to thereby form an intraocular lens comprising the ultraviolet radiation absorbing co-polymer additive physically trapped within a polymethylmethacrylate polymer matrix.
Claim 7
Dependent Claim
96 words
An intraocular lens for implantation into the human eye comprising an ultraviolet radiation absorbing co-polymer physically trapped within a polymethylmethacrylate polymer matrix, said lens being formed by the steps of: (a) co-polymerizing a polymerizable derivative of dihydroxybenzophenone with methyl methacrylate monomer to thereby form an ultraviolet radiation absorbing co-polymer additive; (b) dissolving the ultraviolet radiation absorbing co-polymer additive in methyl methacrylate monomer to thereby form a prepolymer solution; (c) curing the prepolymer solution in a mold to thereby form an intraocular lens comprising the ultraviolet radiation absorbing co-polymer additive physically trapped within a polymethylmethacrylate polymer matrix.
Claim 8
Dependent Claim
22 words
An intraocular lens for implantation into the human eye according to claim 5, wherein the polymerizable derivative is a derivative of 2,4-dihydroxybenzophenone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |