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Patent US4258715A successfully refreshed from Google Patents.
US4258715A
Expired / Lapsed
US
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Radiation crosslinked acrylamide polymer compositions and shaped articles therefrom
Assignee: CR Bard Inc
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Filing: 1978-12-08
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Granted: 1981-03-31
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Expires: 1998-12-08
Abstract
Abstract Improved shaped polymeric articles, including ostomy seals, are obtained by radiation crosslinking an acrylamide polymer composition comprising a water-soluble acrylamide polymer plasticized with a quantity of a water-miscible polyol (containing water) that provides a soft, flexible and elastomeric composition.
Inventors
- 👤 Paul H. Goble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:53
CPC Classifications
A; A61; A61L; A61L28/00; A61L28/0007; A61L28/0015; A61F; A61F5/00; A61F5/44; A61F5/445
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
A shaped polymeric product suitable for application to human skin comprising a water-dispersible acrylamide polymer solvated and plasticized with a water-miscible polyol, or mixture of polyols, containing water wherein the quantity of polyol(s) containing water is between about 125-200 parts per 100 parts of said acrylamide polymer providing a polymeric product that is soft, flexible and elastomeric, said polymeric product being irradiated with ionizing radiation to effect substantial crosslinking of the acrylamide polymer thereby rendering it substantially insoluble in water.
Claim 2
Dependent Claim
80 words
A shaped polymeric product suitable for application to human skin comprising a water-dispersible acrylamide polymer solvated and plasticized with a water-miscible polyol, or mixture of polyols, containing water wherein the quantity of polyol(s) containing water is between about 125-200 parts per 100 parts of said acrylamide polymer providing a polymeric product that is soft, flexible and elastomeric, said polymeric product being irradiated with ionizing radiation to effect substantial crosslinking of the acrylamide polymer thereby rendering it substantially insoluble in water.
Claim 3
Dependent Claim
33 words
The shaped polymeric product of claim 1 wherein the polyol comprises at least 50 percent glycerine and one percent water, and the seal is irradiated with at least 0.7 megarads of gamma radiation.
Claim 4
Dependent Claim
20 words
The shaped polymeric product of claim 2 wherein the acrylamide polymer is a copolymer containing at least 51 percent acrylamide.
Claim 5
Dependent Claim
29 words
The shaped polymeric product of claim 2 wherein a mixture of acrylamide polymers is used, and at least 50 percent of the mixture is a virtual homopolymer of acrylamide.
Claim 6
Dependent Claim
15 words
The shaped polymeric product of claim 2 wherein the acrylamide polymer is virtually only polyacrylamide.
Claim 7
Dependent Claim
22 words
The shaped polymeric product of claims 1, 2, 3, 4 or 5 which further includes a stabilizer reducing odor caused by irradiation.
Claim 8
Dependent Claim
24 words
In an ostomy drainage device, the improvement comprising employing the shaped polymeric product of claim 6 as a seal for said ostomy drainage device.
Claim 9
Dependent Claim
29 words
In an ostomy drainage device, the improvement comprising employing the shaped polymeric product of claims 1, 2, 3, 4 or 5 as a seal for said ostomy drainage device.
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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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |