Patent US2862861A successfully refreshed from Google Patents.
US2862861A
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Copper cyanide plating process and solution therefor
Assignee: Harshaw Chemical Co
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Filing: 1957-02-19
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Granted: 1958-12-02
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Expires: 1977-02-19
Abstract
No abstract record available.
Inventors
- 👤 Paul W Moy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:26
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38; C25D3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A COPPER PLATING SOLUTION COMPRISING AN AQUEOUS SOLUTION OF COPPER CYANIDE, FREE CYANIDE OF THE CLASS CONSISTING OF POTASSIUM AND SODIUM CYANIDES AND AN ADDED THIO-SUBSTITUTED SIX-MEMBER HETEROCYCLIC RING COMPOUND WHEREIN THE MEMBERS OF THE RING COMPRISE FROM ONE TO THREE NITROGEN ATOMS AND THE BALANCE CARBON ATOMS, EACH NITROGEN ATOM FORMING A PART OF A SEPARATE AZOMETHINE GROUP AND BEING CONNECTED TO TWO CARBON ATOMS, AT LEAST ONE CARBON ATOM OF ONE AZOMETHINE GROUP CARRYING A SUBSTITUENT OF THE CLASS CONSISTING OF THIOL, MERCAPTIDE AND ALKYLTHIOL, SAID ALKYLTHIOL HAVING FROM ONE TO THREE CARBON ATOMS, SAID THIO-SUBSTITUTED COMPOUND BEING DISSOLVED IN SAID PLATING SOLUTION IN AN AMOUNT FROM ABOUT 0.05 GRAM PER LITER TO ABOUT 10 GRAMS PER LITER.
Claim 2
Dependent Claim
120 words
A COPPER PLATING SOLUTION COMPRISING AN AQUEOUS SOLUTION OF COPPER CYANIDE, FREE CYANIDE OF THE CLASS CONSISTING OF POTASSIUM AND SODIUM CYANIDES AND AN ADDED THIO-SUBSTITUTED SIX-MEMBER HETEROCYCLIC RING COMPOUND WHEREIN THE MEMBERS OF THE RING COMPRISE FROM ONE TO THREE NITROGEN ATOMS AND THE BALANCE CARBON ATOMS, EACH NITROGEN ATOM FORMING A PART OF A SEPARATE AZOMETHINE GROUP AND BEING CONNECTED TO TWO CARBON ATOMS, AT LEAST ONE CARBON ATOM OF ONE AZOMETHINE GROUP CARRYING A SUBSTITUENT OF THE CLASS CONSISTING OF THIOL, MERCAPTIDE AND ALKYLTHIOL, SAID ALKYLTHIOL HAVING FROM ONE TO THREE CARBON ATOMS, SAID THIO-SUBSTITUTED COMPOUND BEING DISSOLVED IN SAID PLATING SOLUTION IN AN AMOUNT FROM ABOUT 0.05 GRAM PER LITER TO ABOUT 10 GRAMS PER LITER.
References Cited (Backward Citations)
US2609339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |