Patent US5578808A successfully refreshed from Google Patents.
Patent US2792341A successfully refreshed from Google Patents.
US2792341A
Expired / Lapsed
US
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Process for electrodeposition of platinum
Assignee: Huntington Alloys Corp
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Filing: 1955-12-02
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Granted: 1957-05-14
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Expires: 1975-12-02
Abstract
No abstract record available.
Inventors
- 👤 Atkinson Ralph Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:47
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A PROCESS FOR THE PRODUCTION OF THICK, SMOOTH, ADHERENT ELECTRODEPOSITS OF PLATINUM FREE FROM CRACKS IN THE AS-PLATED CONDITION WHICH COMPRISES ESTABLISHING AN AQUEOUS ACID CHLORIDE-CHLOROPLATINATE BATH CONTAINING IN SOLUTION ABOUT 180 TO ABOUT 300 GRAMS PER LITER OF HYDROGEN CHLORIDE, ABOUT 10 TO ABOUT 50 GRAMS PER LITER OF PLATINUM TO PROVIDE A SOURCE OF CHOROPLATINIC ION, THE BALANCE BEING ESSENTIALLY WATER AND ELECTRODEPOSITING PLATINUM FROM SAID BATH WHILE MAINTAINING THE BATH AT A TEMPERATURE BETWEEN ABOUT 45* C. AND ABOUT 90* C. AT SUCH A RATE OF SEPOSITION THAT THE RATE OF DEPOSITION OF THE METAL ON THE CATHODE WHEN PLOTTED AGAINST THE CONCENTRATION OF HYDROGEN CHLORIDE IN THE BATH WILL BE REPRESENTED BY A POINT LYING WITHIN THE AREA FGHEF IN THE ACCOMPANYING DRAWING.
Claim 2
Dependent Claim
127 words
A PROCESS FOR THE PRODUCTION OF THICK, SMOOTH, ADHERENT ELECTRODEPOSITS OF PLATINUM FREE FROM CRACKS IN THE AS-PLATED CONDITION WHICH COMPRISES ESTABLISHING AN AQUEOUS ACID CHLORIDE-CHLOROPLATINATE BATH CONTAINING IN SOLUTION ABOUT 180 TO ABOUT 300 GRAMS PER LITER OF HYDROGEN CHLORIDE, ABOUT 10 TO ABOUT 50 GRAMS PER LITER OF PLATINUM TO PROVIDE A SOURCE OF CHOROPLATINIC ION, THE BALANCE BEING ESSENTIALLY WATER AND ELECTRODEPOSITING PLATINUM FROM SAID BATH WHILE MAINTAINING THE BATH AT A TEMPERATURE BETWEEN ABOUT 45* C. AND ABOUT 90* C. AT SUCH A RATE OF SEPOSITION THAT THE RATE OF DEPOSITION OF THE METAL ON THE CATHODE WHEN PLOTTED AGAINST THE CONCENTRATION OF HYDROGEN CHLORIDE IN THE BATH WILL BE REPRESENTED BY A POINT LYING WITHIN THE AREA FGHEF IN THE ACCOMPANYING DRAWING.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |