Patent US4439583A successfully refreshed from Google Patents.
US4439583A
Expired / Lapsed
US
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Polyurethane diacrylate compositions useful in forming canulae
Assignee: Tyndale Plains Hunter Ltd
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Filing: 1982-09-01
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Granted: 1984-03-27
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Expires: 2002-09-01
Abstract
Abstract Canulae formed of or having a coating of polyurethane diacrylate compositions obtained by reacting a diacrylate in the presence of from about 65 to about 95 weight percent of a hydrophilic polyurethane resin. The compositions 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.
Inventors
- 👤 Francis E. Gould
- 👤 Christian W. Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:43
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2022; A61K9/2031; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/42; A61L15/60; A61L17/00; A61L17/04; C; C08; C08F; C08F283/00; 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; Y10S521/00; Y10S521/905; Y10S528/00; Y10S528/904
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
78 words
A canula, the walls of which are formed of 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
78 words
A canula, the walls of which are formed of 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
17 words
The canula of claim 1 wherein said hydrophilic polyurethane diacrylate has distributed throughout its mass a medicament.
Claim 4
Dependent Claim
10 words
The canula of claim 2 wherein said medicament is iodine.
Claim 5
Dependent Claim
11 words
The canula of claim 1 wherein said diacrylate is a dimethacrylate.
Claim 6
Dependent Claim
12 words
The canula of claim 1 wherein said diacrylate is diethylene glycol diacrylate.
Claim 7
Dependent Claim
21 words
The canula of claim 4 wherein said diacrylate is a polyethylene glycol dimethacrylate having an average molecular weight of about 1586.
Claim 8
Dependent Claim
21 words
The canula of claim 1 wherein said diacrylate is a polyethylene glycol diacrylate having an average molecular weight of about 508.
Claim 9
Dependent Claim
20 words
The canula of claim 1 wherein said hydrophilic polyurethane resin is derived from a mixture of polyols and a diisocyanate.
Claim 10
Dependent Claim
80 words
A canula, at least one wall of which is coated with 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 hydroxy groups and from about 10 to about 35 weight percent of a diacrylate.
Claim 11
Dependent Claim
80 words
A canula, at least one wall of which is coated with 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 hydroxy groups and from about 10 to about 35 weight percent of a diacrylate.
Claim 12
Dependent Claim
11 words
The canula of claim 9 wherein said diacrylate is a dimethacrylate.
Claim 13
Dependent Claim
111 words
A canula, the walls of which are formed of 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 14
Dependent Claim
111 words
A canula, the walls of which are formed of 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 15
Dependent Claim
17 words
The canula of claim 1 wherein said hydrophilic polyurethane diacrylate has distributed throughout its mass a medicament.
Claim 16
Dependent Claim
10 words
The canula of claim 12 wherein said medicament is iodine.
Claim 17
Dependent Claim
11 words
The canula of claim 11 wherein said diacrylate is a dimethacrylate.
Claim 18
Dependent Claim
12 words
The canula of claim 11 wherein said diacrylate is diethylene glycol diacrylate.
Claim 19
Dependent Claim
21 words
The canula of claim 14 wherein said diacrylate is a polyethylene glycol dimethacrylate having an average molecular weight of about 1586.
Claim 20
Dependent Claim
21 words
The canula of claim 11 wherein said diacrylate is a polyethylene glycol diacrylate having an average molecular weight of about 508.
Claim 21
Dependent Claim
20 words
The canula of claim 11 wherein said hydrophilic polyurethane resin is derived from a mixture of polyols and a diisocyanate.
Claim 22
Dependent Claim
20 words
The canula of claim 11 wherein said hydrophilic polyurethane resin is derived from a mixture of polyols and a diisocyanate.
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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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |