US4408023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane diacrylate compositions useful for contact lenses and the like
Assignee: Tyndale Plains Hunter Ltd
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Filing: 1982-06-14
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Granted: 1983-10-04
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Expires: 2002-06-14
Abstract
Abstract Polyurethane diacrylate compositions are obtained by reacting a diacrylate in the presence of from about 30 to about 95 weight percent of a hydrophilic polyurethane resin. The resulting products will form a hydrogel upon immersion in water and are permeable to gases, ions and other low molecular weight species. The hydrophilic polyurethane diacrylate compositions may be molded to form shaped products that are dimensionally stable after repeated exposure to boiling water and exhibit memory. The compositions are useful for making contact lenses and numerous forms of surgical devices, among other things.
Inventors
- 👤 Francis E. Gould
- 👤 Christian W. Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:28
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/42; A61L15/60; A61L17/00; A61L17/04; A61L27/00; A61L27/14; A61L27/16; B; B01; B01D; B01D71/00; B01D71/06; B01D71/54; B01D71/76; B01D71/78; C; C08; C08F; C08F283/00; C08F283/006; C08F299/00; C08F299/02; C08F299/06; C08F299/065; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; C08G2210/00; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/489; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S525/00; Y10S525/92; Y10S525/937
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
73 words
A contact lens comprising a hydrophilic polyurethane diacrylate composition which will form a hydrogel upon immersion in water and is permeable to gases, ions and other low molecular weight species, which composition is dimensionally stable and exhibits memory, said polyurethane diacrylate composition comprising from about 90 to about 65 weight percent of a hydrophilic polyurethane resin characterized by terminal hydroxyl groups and from about 10 to about 35 weight percent of a diacrylate.
Claim 2
Dependent Claim
73 words
A contact lens comprising a hydrophilic polyurethane diacrylate composition which will form a hydrogel upon immersion in water and is permeable to gases, ions and other low molecular weight species, which composition is dimensionally stable and exhibits memory, said polyurethane diacrylate composition comprising from about 90 to about 65 weight percent of a hydrophilic polyurethane resin characterized by terminal hydroxyl groups and from about 10 to about 35 weight percent of a diacrylate.
Claim 3
Dependent Claim
12 words
The contact lens of claim 1 wherein said diacrylate is a dimethacrylate.
Claim 4
Dependent Claim
13 words
The contact lens of claim 1 wherein said diacrylate is diethylene glycol diacrylate.
Claim 5
Dependent Claim
17 words
The contact lens of claim 1 wherein said diacrylate is about 20 weight percent of said composition.
Claim 6
Dependent Claim
22 words
The contact lens of claim 2 wherein said diacrylate is a polyethylene glycol dimethacrylate having an average molecular weight of about 1586.
Claim 7
Dependent Claim
22 words
The contact lens of claim 1 wherein said diacrylate is a polyethylene glycol diacrylate having an average molecular weight of about 508.
Claim 8
Dependent Claim
21 words
The contact lens of claim 1 wherein said hydrophilic polyurethane resin is derived from a mixture of polyols and a diisocyanate.
Claim 9
Dependent Claim
17 words
The contact lens of claim 7 wherein one of the polyols in said mixture is diethylene glycol.
Claim 10
Dependent Claim
29 words
The contact lens of claim 7 wherein one of the polyols in said mixture is a polyethylene glycol having an average molecular weight between about 400 and about 1450.
Claim 11
Dependent Claim
106 words
A contact lens comprising a hydrophilic polyurethane diacrylate composition which will form a hydrogel upon immersion in water; is permeable to gases, ions and other low molecular weight species; is dimensionally stable and exhibits memory; obtained by the reaction of from about 10 to about 35 weight percent of a diacrylate having the formula: ##STR3## wherein R is selected from the group consisting of hydrogen and the methyl radical and n is a whole number, such that the average molecular weight of the diacrylate is no greater than 1586; in the presence of from about 90 to about 65 weight percent of a hydrophilic polyurethane resin.
Claim 12
Dependent Claim
106 words
A contact lens comprising a hydrophilic polyurethane diacrylate composition which will form a hydrogel upon immersion in water; is permeable to gases, ions and other low molecular weight species; is dimensionally stable and exhibits memory; obtained by the reaction of from about 10 to about 35 weight percent of a diacrylate having the formula: ##STR3## wherein R is selected from the group consisting of hydrogen and the methyl radical and n is a whole number, such that the average molecular weight of the diacrylate is no greater than 1586; in the presence of from about 90 to about 65 weight percent of a hydrophilic polyurethane resin.
Claim 13
Dependent Claim
12 words
The contact lens of claim 10 wherein said diacrylate is a dimethacrylate.
Claim 14
Dependent Claim
17 words
The contact lens of claim 10 wherein said diacrylate is about 20 weight percent of said composition.
Claim 15
Dependent Claim
13 words
The contact lens of claim 10 wherein said diacrylate is diethylene glycol diacrylate.
Claim 16
Dependent Claim
22 words
The contact lens of claim 11 wherein said diacrylate is a polyethylene glycol dimethacrylate having an average molecular weight of about 1586.
Claim 17
Dependent Claim
22 words
The contact lens of claim 11 wherein said diacrylate is a polyethylene glycol diacrylate having an average molecular weight of about 508.
Claim 18
Dependent Claim
21 words
The contact lens of claim 10 wherein said hydrophilic polyurethane resin is derived from a mixture of polyols and a diisocyanate.
Claim 19
Dependent Claim
17 words
The contact lens of claim 16 wherein one of the polyols in said mixture is diethylene glycol.
Claim 20
Dependent Claim
28 words
The contact lens of claim 16 wherein one of the polyols in said mixture is diethylene glycol having an average molecular weight between about 400 and about 1450.
Claim 21
Dependent Claim
73 words
A corneal prosthesis comprising a hydrophilic polyurethane diacrylate composition which will form a hydrogel upon immersion in water and is permeable to gases, ions and other low molecular weight species which composition is dimensionally stable and exhibits memory, said polyurethane diacrylate composition comprising from about 90 to about 65 weight percent of a hydrophilic polyurethane resin characterized by terminal hydroxyl groups and from about 10 to about 35 weight percent of a diacrylate.
Claim 22
Dependent Claim
73 words
A corneal prosthesis comprising a hydrophilic polyurethane diacrylate composition which will form a hydrogel upon immersion in water and is permeable to gases, ions and other low molecular weight species which composition is dimensionally stable and exhibits memory, said polyurethane diacrylate composition comprising from about 90 to about 65 weight percent of a hydrophilic polyurethane resin characterized by terminal hydroxyl groups and from about 10 to about 35 weight percent of a diacrylate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |