Patent US2660554A successfully refreshed from Google Patents.
US2660554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bright gold and gold alloy plating baths
Assignee: Individual
•
Filing: 1950-11-10
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Granted: 1953-11-24
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Expires: 1970-11-10
Abstract
No abstract record available.
Inventors
- 👤 Barnet D Ostrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:18
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/62; C25D3/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN ELECTROLYTIC BATH FOR PLATING A METALLIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF GOLD AND GOLD-BASE ALLOYS COMPRISING AN AQUEOUS SOLUTION OF AUROUS CYANIDE HAVING THEREIN A SUFFICIENT AMOUNT OF AN AMINE TAKEN FROMTHE CLASS CONSISTING OF ALKYLENE- AND ALKYLOL-AMINES HAVING 1 TO 12 CARBON ATOMS TO PRODUCE A BRIGHTER DEPOSIT THAN IS OBTAINED BY PLATING FROM SAID BATH IN THE ABSENCE OF SAID SUBSTANCE, AND CONTAINING ABOUT 1.5 TO 2.0 GRAMS OF THEORETICAL FREE ALKALI METAL CYANIDE, THE PH BEING FROM ABOUT 8.0 TO ABOUT 11.5, WHEREBY HEAVY GOLD DEPOSITS WHICH DO NOT REQUIRE BURNISHING ARE OBTAINABLE BY ELECTROLYTIC DEPOSITION.
Claim 2
Dependent Claim
102 words
AN ELECTROLYTIC BATH FOR PLATING A METALLIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF GOLD AND GOLD-BASE ALLOYS COMPRISING AN AQUEOUS SOLUTION OF AUROUS CYANIDE HAVING THEREIN A SUFFICIENT AMOUNT OF AN AMINE TAKEN FROMTHE CLASS CONSISTING OF ALKYLENE- AND ALKYLOL-AMINES HAVING 1 TO 12 CARBON ATOMS TO PRODUCE A BRIGHTER DEPOSIT THAN IS OBTAINED BY PLATING FROM SAID BATH IN THE ABSENCE OF SAID SUBSTANCE, AND CONTAINING ABOUT 1.5 TO 2.0 GRAMS OF THEORETICAL FREE ALKALI METAL CYANIDE, THE PH BEING FROM ABOUT 8.0 TO ABOUT 11.5, WHEREBY HEAVY GOLD DEPOSITS WHICH DO NOT REQUIRE BURNISHING ARE OBTAINABLE BY ELECTROLYTIC DEPOSITION.
References Cited (Backward Citations)
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Cited
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US2048594A
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US2355070A
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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) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |