US4944916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibition
Assignee: Nokia Bell Labs
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Filing: 1989-08-23
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Granted: 1990-07-31
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Expires: 2009-08-23
Abstract
Abstract Corrosion of metals such as silver and copper by sulfur and chlorine containing entities are substantially prevented by surrounding these materials with a suitable polymeric structure. The structure should be a polymer containing a material such as copper or aluminum that reacts readily with corrosive gases. In one advantageous embodiment a polymer bag containing approximately 35 weight percent of dispersed, powdered copper is employed to enclose a metal containing structure such as a printed circuit board. Use of this expedient substantially reduces corrosion of the printed circuit board.
Inventors
- 👤 John P. Franey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:49
CPC Classifications
C; C23; C23F; C23F11/00; C23F15/00; C08; C08K; C08K3/00; C08K3/02; C08K3/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A process for protecting an article including a metal region from corrosion comprising the steps of locating said article in an enclosure, said enclosure having a means for providing said protection comprises particles, said particles comprising a protecting metal chosen from the group consisting of aluminum and copper wherein said particles are embedded in said polymer by introducing and dispersing particulates into said polymer and wherein said surface area of said protecting metal is sufficient to regard said corrosion.
Claim 2
Dependent Claim
79 words
A process for protecting an article including a metal region from corrosion comprising the steps of locating said article in an enclosure, said enclosure having a means for providing said protection comprises particles, said particles comprising a protecting metal chosen from the group consisting of aluminum and copper wherein said particles are embedded in said polymer by introducing and dispersing particulates into said polymer and wherein said surface area of said protecting metal is sufficient to regard said corrosion.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said article comprises an electronic component.
Claim 4
Dependent Claim
10 words
The process of claim 1 wherein said article comprises silver.
Claim 5
Dependent Claim
11 words
The process of claim 3 wherein said enclosure comprises a bag.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein said enclosure comprises a bag.
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) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |