Patent US4643180A successfully refreshed from Google Patents.
US4643180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antimicrobial dressing
Assignee: Ethicon Inc
•
Filing: 1985-02-28
•
Granted: 1987-02-17
•
Expires: 2005-02-28
Abstract
Abstract An adhesive surgical dressing with an antimicrobial agent in the adhesive is disclosed. The antimicrobial agent is a salt of polyhexamethylene biguanide and is applied to the surface of the adhesive to a depth of not more than 50% of the thickness of the adhesive.
Inventors
- 👤 David Feld
- 👤 Toby A. Soto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:08
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/46; A61F; A61F13/00; A61F13/02; A61F13/023; A61L15/58; A61F2013/00361; A61F2013/00655; A61F2013/0071; A61L2300/00; A61L2300/20; A61L2300/204; A61L2300/206; A61L2300/40; A61L2300/404
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
A surgical dressing comprising a sheet of polymeric film coated on one side with a water based adhesive, said adhesive coating being from 10 to 100 microns in thickness and having a film facing surface and a body facing surface, an antimicrobial agent deposited on the body facing surface of said adhesive, said antimicrobial agent being present in the body facing surface to a depth of from no more than 10% to 50% of the thickness of said adhesive, said antimicrobial agent comprising a salt of polyhexamethylene biguanide and being present in an amount of from 0.05% to 2% by weight based on the total weight of the adhesive.
Claim 2
Dependent Claim
109 words
A surgical dressing comprising a sheet of polymeric film coated on one side with a water based adhesive, said adhesive coating being from 10 to 100 microns in thickness and having a film facing surface and a body facing surface, an antimicrobial agent deposited on the body facing surface of said adhesive, said antimicrobial agent being present in the body facing surface to a depth of from no more than 10% to 50% of the thickness of said adhesive, said antimicrobial agent comprising a salt of polyhexamethylene biguanide and being present in an amount of from 0.05% to 2% by weight based on the total weight of the adhesive.
Claim 3
Dependent Claim
21 words
The surgical dressing of claim 1 in which the concentration of the polyhexamethylene biguanide is from 0.45% to 1.2% by weight.
Claim 4
Dependent Claim
24 words
The surgical dressing of claim 1 in which the antimicrobial agent is in the upper 10% to 25% of the thickness of the adhesive.
Claim 5
Dependent Claim
13 words
The surgical dressing of claim 1 in which the polymeric film is polyurethane.
Claim 6
Dependent Claim
85 words
The process of making a surgical dressing comprising applying a water-based skin contact adhesive containing an anionic emulsifier on a substrate, applying an aqueous solution of a salt of polyhexamethylene biguanide onto the surface of the adhesive to a depth of no more than 50% of the thickness of the adhesive, said salt of polyhexamethylene biguanide being applied at a weight of 0.05% to 2% based on the dry weight of the adhesive, drying the coated substrate and covering the adhesive with a release paper.
Claim 7
Dependent Claim
85 words
The process of making a surgical dressing comprising applying a water-based skin contact adhesive containing an anionic emulsifier on a substrate, applying an aqueous solution of a salt of polyhexamethylene biguanide onto the surface of the adhesive to a depth of no more than 50% of the thickness of the adhesive, said salt of polyhexamethylene biguanide being applied at a weight of 0.05% to 2% based on the dry weight of the adhesive, drying the coated substrate and covering the adhesive with a release paper.
Claim 8
Dependent Claim
16 words
The process of claim 5 in which the salt of polyhexamethylene biguanide is the chloride salt.
Claim 9
Dependent Claim
21 words
The process of claim 5 in which the adhesive is dried prior to the application of the salt of polyhexamethylene biguanide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |