Patent US4889530A successfully refreshed from Google Patents.
US4889530A
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Wound dressing containing acrylate or methacrylate hydrogel polymer
Assignee: Edison Polymer Innovation Corp
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Filing: 1988-07-22
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Granted: 1989-12-26
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Expires: 2008-07-22
Abstract
Abstract Acrylate and methacrylate monoesters and diesters having the following formula (I) ##STR1## wherein R 1 , R 2 , R 3 are as defined in the specification, are disclosed. These monomers are polymerizable into hydrogen polymers which are extremely hydrophilic. These hydrogel polymers are useful in the preparation of wound dressings. These polymers form complexes with polyvalent metal ions such as Ca, Mg, Mn and Cu, and possess macrophage stimulating activity in addition to the useful properties possessed by other acrylate and methacrylate hydrogel polymers.
Inventors
- 👤 Daniel J. Smith
- 👤 Sanjay R. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:25
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36; A; A61; A61L; A61L26/00; A61L26/0009; A61L26/0014; A61L26/0061; A61L26/008
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
64 words
A wound dressing containing, as a therapeutically active agent, a hydrogel comprising (a) a cross-linked polymer of a major amount of a compound of the formula (I) ##STR11## wherein R 1 is a divalent hydrocarbon radical containing from 2 to about 6 carbon atoms; R 2 is hydrogen, methyl or ethyl; R 3 is hydrogen or methyl; and Y is ##STR12## and (b) water.
Claim 2
Dependent Claim
64 words
A wound dressing containing, as a therapeutically active agent, a hydrogel comprising (a) a cross-linked polymer of a major amount of a compound of the formula (I) ##STR11## wherein R 1 is a divalent hydrocarbon radical containing from 2 to about 6 carbon atoms; R 2 is hydrogen, methyl or ethyl; R 3 is hydrogen or methyl; and Y is ##STR12## and (b) water.
Claim 3
Dependent Claim
23 words
A wound dressing according to claim 1 wherein said polymer is a polymer of a major amount of Quadrol methacrylate or Quadrol dimethacrylate.
Claim 4
Dependent Claim
11 words
A wound dressing according to claim 1 wherein Y is ##STR13##
Claim 5
Dependent Claim
20 words
A wound dressing according to claim 2 wherein said polymer is a polymer of a major amount of Quadrol monomethacrylate.
Claim 6
Dependent Claim
34 words
A wound dressing according to claim 1 wherein said polymer is a polymer of a major amount of said compound of the formula (I) and a minor amount of one or more hydrophilic comonomers.
Claim 7
Dependent Claim
22 words
A wound dressing according to claim 1 wherein said hydrogel has an equilibrium water content of at least 80 percent by weight.
References Cited (Backward Citations)
US4671267A
Cited
US4781921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-25 | 1993-06-26 | 1993-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-25 | 1997-06-26 | 1997-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-25 | 2001-06-26 | 2001-12-26 | $7700.00 | Window Closed / Lapsed |