Patent US3340164A successfully refreshed from Google Patents.
US3340164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of copper plating anodized aluminum
Assignee: Unisys Corp
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Filing: 1963-12-26
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Granted: 1967-09-05
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Expires: 1983-12-26
Abstract
No abstract record available.
Inventors
- 👤 Zimmerman Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:50
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/053; C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/1803; C23C18/1824; C23C18/1827; C23C18/1834; C23C18/31; C23C18/38; C23C18/40; C23C18/405; H05K1/056; H05K2203/00; H05K2203/03; H05K2203/0315; H05K2203/11; H05K2203/1147
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A METHOD OF PRODUCING PRINTED CIRCUIT ELEMENTS ON ANODIZED ALUMINUM SHEETS COMPRISING: (A) SEALING AN ANODIZED LAYER ON AN ALUMINUM SUBSTRATE BY IMMERSING THE ANODIZED LAYER IN AN AQUEOUS SOLUTION CONTAINING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF COLLODIAL SILICA AND ETHYL SILICATE; (B) APPLYING A COATING OF AN ORGANOPOLYSILOXANE THERETO AND BAKING THE SUBSTRATE TO SEAL THE PORES OF THE ANODIZED LAYER THEREON; (C) SENSITIZING THE ANODIZED SURFACE WITH A STANNOUS SALT AND A SECOND MATERIAL SELECTED FROM THE GROUP CONSISTING OF PALLADIUM, PLATINUM, AND GOLD; AND (D) CONTACTING THE SEALED LAYER WITH A PLATING BATH MAINTAINED AT A TEMPERATURE BELOW 100*F., SAID BATH COMPRISING AN AQUEOUS SOLUTION OF FROM 0.11 TO 1.1 MOLES/LITER OF ALDEHYDE POLYMER REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF PARA-FORMALDEHYDE, TRIOXANE AND PARA-ACETALDEHYDE; FROM 0.003 TO 0.02 MOLE/LITER OF DISSOLVED COPPER IONS; AND FROM 0.02 TO 0.08 MOLE/LITER OF POTASSIUM HYDROXIDE.
Claim 2
Independent Claim
149 words
A METHOD OF PRODUCING PRINTED CIRCUIT ELEMENTS ON ANODIZED ALUMINUM SHEETS COMPRISING: (A) SEALING AN ANODIZED LAYER ON AN ALUMINUM SUBSTRATE BY IMMERSING THE ANODIZED LAYER IN AN AQUEOUS SOLUTION CONTAINING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF COLLODIAL SILICA AND ETHYL SILICATE; (B) APPLYING A COATING OF AN ORGANOPOLYSILOXANE THERETO AND BAKING THE SUBSTRATE TO SEAL THE PORES OF THE ANODIZED LAYER THEREON; (C) SENSITIZING THE ANODIZED SURFACE WITH A STANNOUS SALT AND A SECOND MATERIAL SELECTED FROM THE GROUP CONSISTING OF PALLADIUM, PLATINUM, AND GOLD; AND (D) CONTACTING THE SEALED LAYER WITH A PLATING BATH MAINTAINED AT A TEMPERATURE BELOW 100*F., SAID BATH COMPRISING AN AQUEOUS SOLUTION OF FROM 0.11 TO 1.1 MOLES/LITER OF ALDEHYDE POLYMER REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF PARA-FORMALDEHYDE, TRIOXANE AND PARA-ACETALDEHYDE; FROM 0.003 TO 0.02 MOLE/LITER OF DISSOLVED COPPER IONS; AND FROM 0.02 TO 0.08 MOLE/LITER OF POTASSIUM HYDROXIDE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |