Patent US4991574A successfully refreshed from Google Patents.
US4991574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical dressing
Assignee: Dow Corning France SAS
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Filing: 1990-08-15
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Granted: 1991-02-12
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Expires: 2010-08-15
Abstract
Abstract A surgical dressing comprising a sheet of silicone gel having a wound-facing surface and laminated to the other surface a film of silicone elastomer. The dressing is particularly adapted to the treatment of burns.
Inventors
- 👤 David Pocknell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:26
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; Y; Y10; Y10S; Y10S128/00; Y10S128/21
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
32 words
A surgical dressing comprising an imperforate sheet of silicone gel having a wound-facing surface and a distal surface and an imperforate film of silicone elastomer substantially coextensively laminated to said distal surface.
Claim 2
Dependent Claim
32 words
A surgical dressing comprising an imperforate sheet of silicone gel having a wound-facing surface and a distal surface and an imperforate film of silicone elastomer substantially coextensively laminated to said distal surface.
Claim 3
Dependent Claim
39 words
A surgical dressing as claimed in claim 1 wherein the silicone gel and silicone elastomer are both derived from compositions comprising an alkenyl-substituted polydimethylsiloxane, an organosiloxane having silicon-bonded hydrogen atoms and a compound or complex of a platinum metal.
Claim 4
Dependent Claim
27 words
A surgical dressing as claimed in claim 1 which includes an antiseptic, antibacterial agent, antifungal agent or other substance employed in the treatment of wounds and burns.
Claim 5
Dependent Claim
16 words
A surgical dressing as claimed in claim 3 wherein said other substance is a growth factor.
Claim 6
Dependent Claim
33 words
A process for making a surgical dressing which comprises forming an imperforate cured silicone gel sheet and an imperforate cured silicone elastomer film and thereafter substantially coextensively laminating said film with said sheet.
Claim 7
Dependent Claim
33 words
A process for making a surgical dressing which comprises forming an imperforate cured silicone gel sheet and an imperforate cured silicone elastomer film and thereafter substantially coextensively laminating said film with said sheet.
Claim 8
Dependent Claim
110 words
A process for making a surgical dressing which comprises (1) applying to a non-porous substrate a first composition which is a silicone gel-forming composition or is a silicone elastomer-forming composition, (2) curing the applied composition to form an imperforate layer of cured first composition, (3) applying to the exposed surface of the cured first composition a layer of a second composition which is a silicone elastomer-forming composition or a silicone gel-forming composition respectively and (4) curing the second composition to form an imperforate layer of cured second composition, whereby there is obtained a substantially coextensive laminate of an imperforate sheet of silicone gel and an imperforate film of silicone elastomer.
Claim 9
Dependent Claim
110 words
A process for making a surgical dressing which comprises (1) applying to a non-porous substrate a first composition which is a silicone gel-forming composition or is a silicone elastomer-forming composition, (2) curing the applied composition to form an imperforate layer of cured first composition, (3) applying to the exposed surface of the cured first composition a layer of a second composition which is a silicone elastomer-forming composition or a silicone gel-forming composition respectively and (4) curing the second composition to form an imperforate layer of cured second composition, whereby there is obtained a substantially coextensive laminate of an imperforate sheet of silicone gel and an imperforate film of silicone elastomer.
Claim 10
Dependent Claim
13 words
A process as claimed in claim 6 wherein the substrate is a tray.
Claim 11
Dependent Claim
64 words
A process for making a surgical dressing which comprises contacting an imperforate, cured silicone elastomer film with a silicone gel-forming composition, thereafter curing the silicone gel-forming composition in contact with said silicone elastomer film to form an imperforate sheet of silicone gel whereby there is obtained a substantially coextensive laminate of an imperforate sheet of silicone gel and an imperforate film of silicone elastomer.
Claim 12
Dependent Claim
64 words
A process for making a surgical dressing which comprises contacting an imperforate, cured silicone elastomer film with a silicone gel-forming composition, thereafter curing the silicone gel-forming composition in contact with said silicone elastomer film to form an imperforate sheet of silicone gel whereby there is obtained a substantially coextensive laminate of an imperforate sheet of silicone gel and an imperforate film of silicone elastomer.
Claim 13
Dependent Claim
38 words
A process as claimed in claim 8 wherein the silicone gel and silicone elastomer are both derived from compositions comprising an alkenyl-substituted polydimethylsiloxane, an organosiloxane having silicon-bonded hydrogen atoms and a compound or complex of a platinum metal.
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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) | 1994-02-11 | 1994-08-13 | 1995-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-11 | 1998-08-13 | 1999-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-11 | 2002-08-13 | 2003-02-12 | $7700.00 | Window Closed / Lapsed |