US4507362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Restorative spray coating for insulated copper conductors
Assignee: Nokia Bell Labs
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Filing: 1983-10-12
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Granted: 1985-03-26
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Expires: 2003-10-12
Abstract
Abstract A varnish suitable for spray coating on plastic insulated copper conductors restores cracked or damaged insulation. The varnish cures by reaction in air upon application to the conductors. The varnish comprises drying oil (typically, tung oil and castor oil), phenolic resin, metallic catalysts, and solvents.
Inventors
- 👤 John T. Chapin
- 👤 Raffaele A. Sabia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:53
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/22; H05K3/28; H05K3/285; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/36; H05K3/225; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2935; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/2958
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A copper conductor having a cracked and/or damaged discontinuous primary insulation thereon characterized in that said discontinuous primary insulation has coated thereon a formulation comprising: (A) 2 to 45 weight percent phenolic resin; (B) 25 to 73 total weight percent of at least one oil selected from the group consisting of tung oil and dehydrated castor oil; (C) 25 to 75 weight percent solvent; and (D) 0.01 to 1.4 weight percent metallic catalysts and cocatalysts.
Claim 2
Dependent Claim
75 words
A copper conductor having a cracked and/or damaged discontinuous primary insulation thereon characterized in that said discontinuous primary insulation has coated thereon a formulation comprising: (A) 2 to 45 weight percent phenolic resin; (B) 25 to 73 total weight percent of at least one oil selected from the group consisting of tung oil and dehydrated castor oil; (C) 25 to 75 weight percent solvent; and (D) 0.01 to 1.4 weight percent metallic catalysts and cocatalysts.
Claim 3
Dependent Claim
20 words
The conductor of claim 1 wherein the total amount of solvents is less than 75 weight percent of said formulation.
Claim 4
Dependent Claim
62 words
The conductor of claim 2 wherein said formulation comprises approximately: (A) 18.4 weight percent phenolic resin; (B) 16.9 weight percent tung oil; (C) 9.8 weight percent partially polymerized dehydrated castor oil; (D) 50 weight percent mineral spirits; (E) 2.4 weight percent amyl acetate; (F) 2.4 weight percent N-propanol; (G) 0.0087 weight percent cobalt naphthenate; and (H) 0.029 weight percent zirconium aliphatic acids.
Claim 5
Independent Claim
66 words
A method of restoring a copper conductor having cracked and/or damaged discontinuous insulation thereon characterized by applying to said discontinuous insulation a formulation comprising: (A) 2 to 45 weight percent phenolic resin; (B) 25 to 73 weight percent of at least one drying oil; (C) 25 to 75 weight percent of at least one solvent; and (D) 0.01 to 1.4 weight percent metallic catalysts and cocatalysts.
Claim 6
Independent Claim
66 words
A method of restoring a copper conductor having cracked and/or damaged discontinuous insulation thereon characterized by applying to said discontinuous insulation a formulation comprising: (A) 2 to 45 weight percent phenolic resin; (B) 25 to 73 weight percent of at least one drying oil; (C) 25 to 75 weight percent of at least one solvent; and (D) 0.01 to 1.4 weight percent metallic catalysts and cocatalysts.
Claim 7
Dependent Claim
15 words
The method of claim 4 wherein said formulation is applied by spraying onto said conductor.
Claim 8
Dependent Claim
18 words
The method of claim 4 wherein said insulation is selected from the group consisting of polyethylene or polypropylene.
Claim 9
Dependent Claim
14 words
The method of claim 4 wherein said conductor is on a printed circuit board.
References Cited (Backward Citations)
US1896043A
Cited
US1896041A
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US1896042A
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US1896040A
Cited
US2370046A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |