US4496535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane polyene compositions
Assignee: Tyndale Plains Hunter Ltd
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Filing: 1984-05-07
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Granted: 1985-01-29
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Expires: 2004-05-07
Abstract
Abstract Shaped three-dimensional structures formed of polyurethane polyene compositions obtained by reacting from about 10 to about 50 parts by weight of a polyene in the presence of about 100 parts by weight of a hydrophilic polyurethane resin. The resulting products will swell and increase in weight upon immersion in water and are permeable to gases, moisture vapor, ions, and other low molecular weight species. The hydrophilic polyurethane polyene 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 19:35
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; 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; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1397; Y10T428/28; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
110 words
As an article of manufacture, a shaped, three-dimensional structure formed of a hydrophilic polyurethane polyene composition comprising from about 10 to about 50 parts by weight of a polyene selected from the group consisting of polyallyl esters having the formula: ##STR7## wherein n is a whole number larger than 1 and smaller than 4, and R is the residue of a polybasic acid; and polyacrylic esters having the formula: ##STR8## wherein n is a whole number larger than 2 and smaller than 7, R is hydrogen or a methyl radical and A is the residue of a polyhydric alcohol; and about 100 parts by weight of a hydrophilic polyurethane resin.
Claim 2
Dependent Claim
110 words
As an article of manufacture, a shaped, three-dimensional structure formed of a hydrophilic polyurethane polyene composition comprising from about 10 to about 50 parts by weight of a polyene selected from the group consisting of polyallyl esters having the formula: ##STR7## wherein n is a whole number larger than 1 and smaller than 4, and R is the residue of a polybasic acid; and polyacrylic esters having the formula: ##STR8## wherein n is a whole number larger than 2 and smaller than 7, R is hydrogen or a methyl radical and A is the residue of a polyhydric alcohol; and about 100 parts by weight of a hydrophilic polyurethane resin.
Claim 3
Dependent Claim
15 words
The article of manufacture as defined in claim 1 wherein the structure is a film.
Claim 4
Dependent Claim
15 words
The article of manufacture as defined in claim 2 wherein the film contains a medicament.
Claim 5
Dependent Claim
22 words
The article of manufacture as defined in claim 1 wherein the structure is a burn dressing in the form of a film.
Claim 6
Dependent Claim
22 words
The article of manufacture as defined in claim 1 wherein the structure is in the form of an implant containing a medicament.
Claim 7
Dependent Claim
15 words
The article of manufacture as defined in claim 5 wherein the medicament is a hormone.
Claim 8
Dependent Claim
15 words
The article of manufacture as defined in claim 5 wherein the medicament is a steroid.
Claim 9
Dependent Claim
20 words
The article of manufacture as defined in claim 1 wherein the structure is in the form of an intrauterine device.
Claim 10
Dependent Claim
17 words
The article of manufacture as defined in claim 8 wherein the intrauterine device contains a contraceptive composition.
Claim 11
Dependent Claim
15 words
The article of manufacture as defined in claim 9 wherein the contraceptive is lactic acid.
Claim 12
Dependent Claim
19 words
The article of manufacture as defined in claim 1 wherein the structure is in the form of a diaphragm.
Claim 13
Dependent Claim
19 words
The article of manufacture as defined in claim 1 wherein the structure is in the form of a canula.
Claim 14
Dependent Claim
20 words
The article of manufacture as defined in claim 12 wherein the canula has distributed throughout its mass is a medicament.
Claim 15
Dependent Claim
26 words
The article of manufacture as defined in claim 1 wherein the structure is in the form of an oral delivery system containing a pharmacologically active agent.
Claim 16
Dependent Claim
21 words
The article of manufacture as defined in claim 1 wherein the structure is in the form of a gas permeable membrane.
Claim 17
Dependent Claim
21 words
The article of manufacture as defined in claim 1 wherein the structure is in the form of a moisture-vapor permeable membrane.
Claim 18
Dependent Claim
15 words
The article of manufacture as defined in claim 1 wherein the structure has been molded.
Claim 19
Dependent Claim
16 words
The article of manufacture as defined in claim 1 wherein the structure is a contact lens.
Claim 20
Dependent Claim
21 words
The article of manufacture as defined in claim 18 wherein the structure is cast into the form of a contact lens.
Claim 21
Dependent Claim
16 words
The article of manufacture as defined in claim 1 wherein the structure is a corneal prosthesis.
Claim 22
Dependent Claim
22 words
The article of manufacture as defined in claim 1 wherein the structure is a surgical drape in the form of a film.
Claim 23
Dependent Claim
22 words
The article of manufacture as defined in claim 21 wherein the film is coated on at least one side with an adhesive.
Claim 24
Dependent Claim
20 words
The article of manufacture as defined in claim 1 wherein the structure is in the form of a dialysis membrane.
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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) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |