US4466431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dressings, manufacture and use
Assignee: Smith and Nephew PLC
•
Filing: 1982-05-07
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Granted: 1984-08-21
•
Expires: 2002-05-07
Abstract
Abstract A dressing which comprises an ointment impregnated open-work support, having a protector on at least one face thereof characterized in that the protector is a film soluble in water, materials therefor and the manufacture thereof are described.
Inventors
- 👤 John Tharrat
- 👤 Sally-Jane Harlock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:05
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/46; A61F; A61F13/00; A61F13/00051; A61F13/00063; A61L15/22; A61L15/34; A61F13/15; A61F13/15203; A61F13/15211; A61F13/551; A61F13/84; A61F13/8405; A61F2013/00089; A61F2013/00246; A61F2013/00259; A61F2013/00361; A61F2013/00855; A61F2013/00868; A61F2013/00902; A61F2013/0091; A61L2300/00; A61L2300/20; A61L2300/202; A61L2300/204; A61L2300/206; A61L2300/40; A61L2300/404
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
29 words
A sterile dressing which comprises a hydrophobic or non-water containing hydrophilic ointment impregnated open-work support having a protector on both faces thereof, said protectors being films soluble in water.
Claim 2
Dependent Claim
29 words
A sterile dressing which comprises a hydrophobic or non-water containing hydrophilic ointment impregnated open-work support having a protector on both faces thereof, said protectors being films soluble in water.
Claim 3
Dependent Claim
18 words
A sterile dressing according to claim 1 in which the ointment impregnated open-work support is a tulle gras.
Claim 4
Dependent Claim
15 words
A sterile dressing according to claims 1 or 2 within a sealed bacteria proof pouch.
Claim 5
Dependent Claim
23 words
A sterile dressing according to claim 1 in which the films have thinner areas to aid the dispersal of the films in water.
Claim 6
Dependent Claim
24 words
A sterile dressing according to claim 1 in which the films have a weight per unit area of 15 to 50 g/m 2 .
Claim 7
Dependent Claim
16 words
A dressing according to claim 1 in which the ointment contains a topically acceptible antibacterial agent.
Claim 8
Dependent Claim
22 words
A dressing according to claim 6 in which the antibacterial agent is present as 0.4% to 15% by weight of the ointment.
Claim 9
Dependent Claim
29 words
A dressing according to claim 1 in which the open-work support is impregnated with an ointment at a weight per unit area of 120 to 200 g/m 2 .
Claim 10
Dependent Claim
33 words
A sterile dressing which comprises a tulle gras, a protector on both faces of the tulle gras and a pouch enclosing the tulle gras and protectors, said protectors being films soluble in water.
Claim 11
Dependent Claim
33 words
A sterile dressing which comprises a tulle gras, a protector on both faces of the tulle gras and a pouch enclosing the tulle gras and protectors, said protectors being films soluble in water.
Claim 12
Dependent Claim
22 words
A dressing according to claim 9 in which the films are films of polyvinyl alcohol containing 10 to 22% acetylated hydroxyl groups.
Claim 13
Dependent Claim
21 words
A dressing according to claim 10 in which the polyvinyl alcohol contains 1 to 20% by weight of an alcohol plascticizer.
Claim 14
Dependent Claim
17 words
A dressing according to claim 9 in which the tulle gras contains a topically acceptible antibacterial agent.
Claim 15
Dependent Claim
15 words
A dressing according to claim 12 in which the antibacterial agent is a chlorhexidine salt.
Claim 16
Dependent Claim
15 words
A dressing according to claim 12 in which the antibacterial agent is polyvinyl pyrrolidone iodine.
Claim 17
Dependent Claim
43 words
A process for the production of the dressing of claim 9 which comprises placing a film soluble in water on both sides of the tulle gras, sealing the tulle gras with the films into a pouch and sterilizing the pouch and its contents.
References Cited (Backward Citations)
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Cited
US3328259A
Cited
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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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |