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Patent US5320908A successfully refreshed from Google Patents.
US5320908A
Expired / Lapsed
US
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Deposition of an extremely thin silver layer on a nonconducting substrate
Assignee: Bactiguard AB
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Filing: 1993-02-12
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Granted: 1994-06-14
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Expires: 2013-02-12
Abstract
Abstract Metallic silver is deposited upon the surface of a nonconducting substrate using a multi-step wet deposition process. The surface is cleaned, and then activated in an aqueous solution containing stannous tin. The silver is deposited as a colloidal material from an aqueous solution of a silver-containing salt, a reduction agent that reduces the salt to form the metallic silver, and a deposition control agent that prevents the silver from nucleating throughout the solution. After the substrate is coated, the coating is stabilized in an aqueous solution of a salt of a metal from the platinum group of gold, dissolved in dilute hydrochloric acid. The process is particularly effective for depositing uniform films of 2 to 2000 Angstroms thickness, which strongly adhere to the substrate.
Inventors
- 👤 Billy V. Sodervall
- 👤 Thomas Lundeberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:48
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/14; A61L29/16; A61L29/08; A61L29/10; A61L29/106; C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/42; C23C18/44; A61L2300/00; A61L2300/10; A61L2300/102; A61L2300/104; A61L2300/40; A61L2300/404; A61L2300/45; A61L2300/452; A61L2300/60; A61L2300/606; Y; Y10; Y10S; Y10S604/00; Y10S604/905; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31707
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
9 words
An antimicrobial medical device comprising a nonconducting substrate, wherein
Claim 2
Dependent Claim
9 words
An antimicrobial medical device comprising a nonconducting substrate, wherein
Claim 3
Dependent Claim
31 words
The medical device of claim 1 wherein said nonconducting substrate is selected from the group consisting of latex, polystyrene, polyester, polyvinylchloride, polyurethane, ABS polymers, polycarbonate, polyamide, polytetrafluoroethylene, polyimide and synthetic rubber.
Claim 4
Dependent Claim
12 words
The medical device of claim 2 wherein the nonconducting substrate is latex.
Claim 5
Dependent Claim
25 words
The medical device of claim 1 wherein the platinum group metal is selected from the group consisting of platinum, palladium, rhodium, iridium, ruthenium and osmium.
Claim 6
Dependent Claim
13 words
The medical device of claim 4 wherein said platinum group metal is palladium.
Claim 7
Dependent Claim
10 words
The medical device of claim 1 which is an implant.
Claim 8
Dependent Claim
10 words
The medical device of claim 1 which is a glove.
Claim 9
Dependent Claim
10 words
The medical device of claim 1 which is a condom.
Claim 10
Dependent Claim
11 words
The medical device of claim 1 which is a wound dressing.
Claim 11
Dependent Claim
10 words
The medical device of claim 1 which is a catheter.
Claim 12
Dependent Claim
17 words
The medical device of claim 1 wherein the total surface area of said nonconducting substrate is coated.
Claim 13
Dependent Claim
14 words
The medical device of claim 1 which is further coated with a hydrogel layer.
Claim 14
Dependent Claim
15 words
The medical device of claim 1 wherein said coating is transparent to the human eye.
Claim 15
Dependent Claim
71 words
An antimicrobial medical device comprising a nonconducting substrate, wherein said nonconducting substrate is coated over at least a portion of its surface area with an adhesive, antimicrobial, biocompatible coating consisting essentially of a layer of silver overlain by a layer of one or more platinum group metals or gold metal or combination thereof, wherein said coating is 2-2000 Å in thickness, and wherein said coating is transparent to the human eye.
Claim 16
Dependent Claim
71 words
An antimicrobial medical device comprising a nonconducting substrate, wherein said nonconducting substrate is coated over at least a portion of its surface area with an adhesive, antimicrobial, biocompatible coating consisting essentially of a layer of silver overlain by a layer of one or more platinum group metals or gold metal or combination thereof, wherein said coating is 2-2000 Å in thickness, and wherein said coating is transparent to the human eye.
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) | 1997-06-13 | 1997-12-13 | 1998-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-13 | 2001-12-13 | 2002-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-13 | 2005-12-13 | 2006-06-14 | $7700.00 | Window Closed / Lapsed |