Patent US2986678A successfully refreshed from Google Patents.
Patent EP0308130A2 successfully refreshed from Google Patents.
EP0308130A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Deformable-elastic intraocular lens
Assignee: AMO Puerto Rico Inc
•
Filing: 1988-09-08
•
Granted: —
•
Expires: 2008-09-08
Abstract
Abstract A deformable-elastic lens body (10) is made of crosslinked acrylic material formed of copolymers of methacrylate and acrylate esters. These are relatively hard and relatively soft at body temperature and are crosslinked with a diacrylate ester to produce an acrylic copolymer having, ideally, a substantially tack-free surface, a crosslink density of between 0.5 x 10⁻² and 1.5 x 10⁻² moles per litre, a glass transition temperature in the range of -30°C to 25°C, a tensile modulus between 1000 and 3000 psi and an elongation at break of 100% or greater.
Inventors
- 👤 Amitava Gupta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 05:30
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/14; A61L27/16; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1616; A61F2210/00; A61F2210/0014; A61L2430/00; A61L2430/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
37 words
A deformable-elastic intraocular lens body (10) of cross-linked acrylic material, characterised in that said material comprises copolymers of methacrylate and acrylate esters which are relatively hard and relatively soft at body temperature, crosslinked with a diacrylate ester.
Claim 2
Dependent Claim
37 words
A deformable-elastic intraocular lens body (10) of cross-linked acrylic material, characterised in that said material comprises copolymers of methacrylate and acrylate esters which are relatively hard and relatively soft at body temperature, crosslinked with a diacrylate ester.
Claim 3
Dependent Claim
57 words
A lens body according to Claim 1 wherein the cross-linked acrylic material has a substantially tack-free surface, a crosslink density of between 0.5 x 10⁻² and 1.5 x 10⁻² moles per litre, a glass transition temperature between -30 and 25°C, a tensile modulus between 1000 and 3000 psi and an elongation at break of at least 100%.
Claim 4
Dependent Claim
36 words
A deformable-elastic intraocular lens (IOL) comprising a deformable-elastic lens body (10) as claimed in Claim 1 or 2 and flexible haptics (18) attached to the lens body (10) to position the lens body in the eye.
Claim 5
Dependent Claim
32 words
An intraocular lens according to Claim 3 wherein each haptic (18) is attached by an enlarged end thereof having been inserted into a hole in an edge of the lens body (10).
Claim 6
Independent Claim
70 words
A method of forming a deformable-elastic intaocular lens body comprising the steps of: (a) mixing copolymers of methacrylate and acrylate esters which are relatively hard and relatively soft at body temperature; (b) partially polymerizing the product of Step (a); (c) chemically crosslinking the product of Step (b) with a diacrylate ester; (d) curing the product of Step (c); and (e) forming a lens body from the product of Step (d).
Claim 7
Independent Claim
70 words
A method of forming a deformable-elastic intaocular lens body comprising the steps of: (a) mixing copolymers of methacrylate and acrylate esters which are relatively hard and relatively soft at body temperature; (b) partially polymerizing the product of Step (a); (c) chemically crosslinking the product of Step (b) with a diacrylate ester; (d) curing the product of Step (c); and (e) forming a lens body from the product of Step (d).
Claim 8
Dependent Claim
28 words
A method according to Claim 5 wherein Step (e) comprises holding the product of Step (d) at a temperature below its Beta-relaxation temperature while machining the lens body.
Claim 9
Dependent Claim
29 words
A method according to Claim 5 or 6 wherein the methacrylate and acrylate esters are mixed together in Sept (a) in approximately a 45 to 55% by weight ratio.
Claim 10
Dependent Claim
24 words
A method according to Claim 5, 6 of 7 further including the mixing of a UV-absorber and a free radical initiator in Step (a).
Claim 11
Independent Claim
19 words
A method according to any of Claims 5 to 8 wherein the relatively hard methacrylate ester is a fluoroacrylate.
Claim 12
Dependent Claim
53 words
A method according to Claim 9 wherein Step (a) comprises mixing the fluoroacrylate in a concentration range by weight of between 5 and 25% with ethyl methacrylate in a concentration range by weight of between 25 and 45% and an acrylate ester in a concentration range by weight of between 30 and 60%.
Claim 13
Dependent Claim
15 words
A method according to Claim 9 or 10 wherein the fluoroacrylate is trifluoro ethyl methacrylate.
Claim 14
Dependent Claim
21 words
A method according to Claim 10 wherein the acrylate ester is selected from n-butyl acrylate, ethyl acrylate and 2-ethyl hexyl acrylate.
Claim 15
Independent Claim
29 words
A method according to any of Claims 5 to 12 wherein the diacrylate ester of Step (c) is present in a percent by weight concentration of 0.5 to 3.0%.
Claim 16
Independent Claim
30 words
A method according to any of Claims 5 to 13 wherein the diacrylate ester of Step (c) is selected from ethylene glycol dimethacrylate, propylene glycol dimethacrylate, and ethylene glycol diacrylate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.