US2667453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electroplating copper on metal articles
Assignee: AT&T Inc
•
Filing: 1950-06-03
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Granted: 1954-01-26
•
Expires: 1970-06-03
Abstract
No abstract record available.
Inventors
- 👤 Guy E Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:24
CPC Classifications
C; C25; C25D; C25D7/00; C25D7/06; C25D7/0607; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5152; Y10T29/5165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
208 words
THE METHOD OF ELECTROPLATING COPPER ON STEEL WIRES, WHICH COMPRISES CONTINUOUSLY ADVANCING A STEEL WIRE AS A CATHODE SERIATIM THROUGH AN ALKALINE CYANIDE FLASH COATING BATH CONTAINING COPPER DISOLVED THEREIN AT A CONCENTRATION WITHIN THE RANGE OF FROM ABOUT 1.5 TO ABOUT 3.0 OUNCES PER GALLON, A SECOND ALKALINE CYANIDE BATH CONTAINING COPPER DISSOLVED THEREIN AT A CONCENTRATION WITHIN THE RANGE OF FROM ABOUT 4.5 TO ABOUT 7.0 OUNCES PER GALLON, AND AN ACID PLATING BATH CONTAINING A STILL HIGHER CONCENTRATION OF COPPER DISSOLVED THEREIN, MAINTAINING IN THE CYANIDE FLASH BATH A CATHODE CURRENT DENSITY WITHIN THE RANGE OF FROM ABOUT 20 TO ABOUT 75 AMPERES PER SQUARE FOOT FOR A PERIOD OF TIME SUFFICIENT TO DEPOSIT A VERY THIN AND VERY FINE-GRAINED FLASH COATING OF COPPER WHICH SETS A SIZE PATTERN THAT CAUSES SUBSEQUENT DEPOSITS ON THE WIRE TO BE SIMILARLY FINE-GRAINED, MAINTAINING IN THE SECOND CYANIDE BATH A CATHODE CURRENT DENSITY SUBSTANTIALLY HIGHER THAN THE CURRENT DENSITY IN THE FLASH COATING BATH TO DEPOSIT A FINE-GRAINED COPPER COATING SUBSTANTIALLY TICKER THAN THE FLASH COATING OF COPPER, AND MAINTAINING IN THE ACID PLATING BATH A STILL HIGHER CATHODE CURRENT DENSITY TO FORM A THICK COPPER DEPOSIT WHICH INCREASES MATERIALLY THE ELECTRICAL CONDUCTIVITY OF THE RESULTING COMPOSITE WIRE.
Claim 2
Independent Claim
208 words
THE METHOD OF ELECTROPLATING COPPER ON STEEL WIRES, WHICH COMPRISES CONTINUOUSLY ADVANCING A STEEL WIRE AS A CATHODE SERIATIM THROUGH AN ALKALINE CYANIDE FLASH COATING BATH CONTAINING COPPER DISOLVED THEREIN AT A CONCENTRATION WITHIN THE RANGE OF FROM ABOUT 1.5 TO ABOUT 3.0 OUNCES PER GALLON, A SECOND ALKALINE CYANIDE BATH CONTAINING COPPER DISSOLVED THEREIN AT A CONCENTRATION WITHIN THE RANGE OF FROM ABOUT 4.5 TO ABOUT 7.0 OUNCES PER GALLON, AND AN ACID PLATING BATH CONTAINING A STILL HIGHER CONCENTRATION OF COPPER DISSOLVED THEREIN, MAINTAINING IN THE CYANIDE FLASH BATH A CATHODE CURRENT DENSITY WITHIN THE RANGE OF FROM ABOUT 20 TO ABOUT 75 AMPERES PER SQUARE FOOT FOR A PERIOD OF TIME SUFFICIENT TO DEPOSIT A VERY THIN AND VERY FINE-GRAINED FLASH COATING OF COPPER WHICH SETS A SIZE PATTERN THAT CAUSES SUBSEQUENT DEPOSITS ON THE WIRE TO BE SIMILARLY FINE-GRAINED, MAINTAINING IN THE SECOND CYANIDE BATH A CATHODE CURRENT DENSITY SUBSTANTIALLY HIGHER THAN THE CURRENT DENSITY IN THE FLASH COATING BATH TO DEPOSIT A FINE-GRAINED COPPER COATING SUBSTANTIALLY TICKER THAN THE FLASH COATING OF COPPER, AND MAINTAINING IN THE ACID PLATING BATH A STILL HIGHER CATHODE CURRENT DENSITY TO FORM A THICK COPPER DEPOSIT WHICH INCREASES MATERIALLY THE ELECTRICAL CONDUCTIVITY OF THE RESULTING COMPOSITE WIRE.
References Cited (Backward Citations)
US2317350A
Cited
US2420291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |