US4643181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antimicrobial dressing or drape material
Assignee: Ethicon Inc
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Filing: 1986-04-04
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Granted: 1987-02-17
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Expires: 2006-04-04
Abstract
Abstract A surgical dressing or incise drape material comprising a substrate coated with an antimicrobial containing adhesive. The antimicrobial is polyhexamethylene biguanide hydrochloride and is distributed in the adhesive as particles having a size of from 20 to 300 microns.
Inventors
- 👤 Craig C. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:34
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/14; A61L31/16; A61B; A61B46/00; A61L15/00; A61L15/16; A61L15/42; A61L15/46; A61L15/58; A61L2300/00; A61L2300/20; A61L2300/204; A61L2300/206; A61L2300/40; A61L2300/404; A61L2300/60; A61L2300/62; A61L2300/622
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
48 words
A surgical dressing comprising a substrate coated on one surface with a solvent based skin contact adhesive, said adhesive having a thickness of from 30 to 60 microns, particles of polyhexamethylene biguanide hydrochloride distributed through the adhesive, said particles having a size of from 20 to 300 microns.
Claim 2
Dependent Claim
48 words
A surgical dressing comprising a substrate coated on one surface with a solvent based skin contact adhesive, said adhesive having a thickness of from 30 to 60 microns, particles of polyhexamethylene biguanide hydrochloride distributed through the adhesive, said particles having a size of from 20 to 300 microns.
Claim 3
Dependent Claim
18 words
The dressing of claim 1 in which the particles have a size of from 30 to 200 microns.
Claim 4
Dependent Claim
28 words
The dressing of claim 1 in which the particles have a size of from 50 to 120 microns and a median particle size of at least 20 microns.
Claim 5
Dependent Claim
16 words
The dressing of claim 1 in which the particles are in the form of flattened spheres.
Claim 6
Dependent Claim
11 words
The dressing of claim 1 in which the adhesive is hydrophilic.
Claim 7
Dependent Claim
22 words
The dressing of claim 5 in which the adhesive is a copolymer of isooctylacylate a n-vinylpyrrolidone in a weight ratio of 85/15.
Claim 8
Dependent Claim
78 words
A process of forming adhesive coated surgical dressing containing an antimicrobial comprising mixing a 20% aqueous solution of polyhexamethylene biguanide hydrochloride with a solvent which is compatible with the adhesive at a mixing speeding of no more than 300 RRM, adding the mixture to an adhesive, applying the adhesive to a release surface in an amount of from 40 to 55 grams per square meter, drying the adhesive, and applying a substrate for the dressing to the adhesive.
Claim 9
Dependent Claim
78 words
A process of forming adhesive coated surgical dressing containing an antimicrobial comprising mixing a 20% aqueous solution of polyhexamethylene biguanide hydrochloride with a solvent which is compatible with the adhesive at a mixing speeding of no more than 300 RRM, adding the mixture to an adhesive, applying the adhesive to a release surface in an amount of from 40 to 55 grams per square meter, drying the adhesive, and applying a substrate for the dressing to the adhesive.
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 |