US4838253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone gel coated permeable wound dressing
Assignee: Systagenix Wound Management IP Co BV
•
Filing: 1987-06-22
•
Granted: 1989-06-13
•
Expires: 2007-06-22
Abstract
Abstract A wound dressing comprises, in one embodiment, a layer of apertured material, such as a cotton gauze, coated with a tacky silicone gel or a non-tacky silicone elastomer. In an alternative embodiment, the dressing has a tacky silicone gel on one surface and a non-tacky silicone elastomer on the other surface. The gel and elastomer may be formed by crosslinking a mixture of a vinyl-substituted poly(dimethylsiloxane) and a hydride-containing poly(dimethylsiloxane).
Inventors
- 👤 Nigel J. Brassington
- 👤 John A. Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:07
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61F; A61F13/00; A61F13/01; A61F13/01008; A61L15/42; A61L15/58; A61F13/15; A61F13/84; A61F13/8405; A61F2013/00089; A61F2013/00217; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/00744; A61F13/53; A61F2013/530802; Y; Y10; Y10S; Y10S128/00; Y10S128/21; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
50 words
A liquid permeable wound dressing which is non-adherent to wounds comprising one or more sheets of apertured liquid permeable material coated with a sufficient amount of cross-linked tacky silicone gel to effectively encapsulate the one or more sheets of apertured liquid permeable material but insufficient to occlude the apertures therein.
Claim 2
Dependent Claim
50 words
A liquid permeable wound dressing which is non-adherent to wounds comprising one or more sheets of apertured liquid permeable material coated with a sufficient amount of cross-linked tacky silicone gel to effectively encapsulate the one or more sheets of apertured liquid permeable material but insufficient to occlude the apertures therein.
Claim 3
Dependent Claim
19 words
A dressing according to claim 1 wherein the gel has a peel strength of from 5 to 100 g.
Claim 4
Dependent Claim
19 words
A dressing according to claim 1 wherein the gel has a tensile strength of from 50 to 400 g.
Claim 5
Dependent Claim
18 words
A dressing according to claim 1 wherein the gel has a penetrability of from 5 to 50 mm.
Claim 6
Dependent Claim
22 words
A dressing according to claim 1 wherein the weight of gel present is from 70 to 700 g/m 2 of apertured material.
Claim 7
Dependent Claim
17 words
A dressing according to claim 1 wherein the apertured material is a woven, nonwoven or knitted mesh.
Claim 8
Dependent Claim
40 words
A dressing according to claim 1 comprising one or more layers of support material, wherein each layer has two surfaces having a tacky silicone gel coating on one surface thereof and, a non-tacky silicone elastomer coating on the other surface.
Claim 9
Dependent Claim
110 words
A dressing according to claim 7 wherein the tacky silicone gel has a peel strength of from 5 to 100 g., and a tensile strength of from 50 to 400 g. and a penetrability of from 5 to 50 mm. and is present in an amount by weight from 70 to 700 g./m 2 of the apertured material; and the non-tacky silicone elastomer has a peel strength of from 0 to 15 g. and a tensile strength of from 100 to 600 g. and a penetrability of from 1 to 10 mm. and is present in an amount by weight from 20 to 700 g./m 2 of the apertured material.
Claim 10
Independent Claim
56 words
A method of forming a wound dressing which is non-adherent to wounds comprising coating one or more sheets of apertured material with an amount of silicone gel precursor which is sufficient to effectively encapsulate the one or more sheets of apertured material, but insufficient to occlude the apertures therein, and curing said precursor to form gel.
Claim 11
Independent Claim
56 words
A method of forming a wound dressing which is non-adherent to wounds comprising coating one or more sheets of apertured material with an amount of silicone gel precursor which is sufficient to effectively encapsulate the one or more sheets of apertured material, but insufficient to occlude the apertures therein, and curing said precursor to form gel.
Claim 12
Dependent Claim
20 words
A method according to claim 9 wherein said silicone gel precursor comprises a mixture of vinylsubstituted poly(dimethylsiloxane) and hydridecontaining poly(dimethylsiloxane).
References Cited (Backward Citations)
US3042549A
Cited
GB898826A
Cited
US3050491A
Cited
US3697473A
Cited
US4175557A
Cited
US4259467A
Cited
US4684557A
Cited
US4418822A
Cited
US4373519A
Cited
US4408996A
Cited
EP0100148A1
Cited
US4661099A
Cited
US4690683A
Cited
US4684538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |