US4649909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite surgical dressing
Assignee: Ethicon Inc
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Filing: 1981-12-11
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Granted: 1987-03-17
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Expires: 2001-12-11
Abstract
Abstract A surgical dressing is disclosed which is composed of a polymeric film having a moisture vapor transmission rate between 15 and 80 grams per 100 sq. inches per 24 hours. There is an adhesive around the periphery on the lower surface of the film and a series of apertures through the film of the adhesive. There is an absorbent pad on the upper surface of the film secured in place by a fibrous covering material. The fibrous covering material is adhesively coated and is of the same dimensions as the film so that it may be removed without lifting the film from the skin of the patient.
Inventors
- 👤 Darrell R. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:30
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61F; A61F13/00; A61F13/02; A61F13/023; A61L15/22; A61L15/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
A surgical dressing comprising: a polymeric film between 0.5 and 5 mils in thickness, the moisture vapor transmission rate of the intact film being between 15 and 80 grams per 100 sq. inches per 24 hours, said film having a top surface and a bottom surface, a skin adhering adhesive around the periphery of the bottom surface of the film, a series of apertures in the film adjacent the area coated with the adhesive, an absorbent pad in contact with the top surface of the film and overlying the apertures in the film, an adhesively coated fibrous covering overlying said absorbent pad and in contact with the top surface of the film, the adhesive coating of said fibrous covering terminating adjacent one edge of said covering to provide an adhesivefree edge to enable the fibrous backing to be lifted from the film, the fibrous covering having a surface area which is no larger than the surface area of the polymeric film.
Claim 2
Dependent Claim
161 words
A surgical dressing comprising: a polymeric film between 0.5 and 5 mils in thickness, the moisture vapor transmission rate of the intact film being between 15 and 80 grams per 100 sq. inches per 24 hours, said film having a top surface and a bottom surface, a skin adhering adhesive around the periphery of the bottom surface of the film, a series of apertures in the film adjacent the area coated with the adhesive, an absorbent pad in contact with the top surface of the film and overlying the apertures in the film, an adhesively coated fibrous covering overlying said absorbent pad and in contact with the top surface of the film, the adhesive coating of said fibrous covering terminating adjacent one edge of said covering to provide an adhesivefree edge to enable the fibrous backing to be lifted from the film, the fibrous covering having a surface area which is no larger than the surface area of the polymeric film.
Claim 3
Dependent Claim
13 words
The surgical dressing of claim 1 in which the polymeric film is polyurethane.
Claim 4
Dependent Claim
27 words
The surgical dressing of claim 1 in which apertures are 1 to 2 millimeters in diameter and are spaced 1 to 5 centimeters from an adjacent aperture.
Claim 5
Dependent Claim
19 words
The surgical dressing of claim 3 in which there are additional apertures in the center region of the film.
Claim 6
Dependent Claim
20 words
The surgical dressing of claim 1 in which the absorbent pad has a non-adhering facing in contact with the film.
References Cited (Backward Citations)
US3645835A
Cited
US4231357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |