US2895889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low stress electrodeposited rhodium
Assignee: SEL REX PRECIOUS METALS Inc
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Filing: 1957-01-10
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Granted: 1959-07-21
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Expires: 1977-01-10
Abstract
No abstract record available.
Inventors
- 👤 Schumpelt Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:46
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/50; H; H01; H01J; H01J19/00; H01J19/28; H01J19/30; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS OF ELECRROPLATING RHODIUM METAL UNDER LOW INTERNAL STRESS COMPRISING ELECTRODEPOSITING RHODIUM UPON A BASIS METAL FROM AN AQUEOUS BATH CONSISTING ES-SENTIALLY OF 20-100 CC. PER LITER OF FREE SULFURIC ACID, 2 TO ABOUT 5 GRAMS PERLITER OF RHODIUM ADDED AS RHODIUM SULFATE AND 10-100 GRAMS PER LITER OF MAGNESIUM SULFATE, THE REMAINDER BEING WATER, ELECTRODEPOSITING RHODIUM FROM SAID BATH AT A CURRENT DENSITY OF FROM 4 TO 20 AMPERES PER SQUARE FOOT AND AT A TEMPERATURE OF ABOUT 20* C. TO ABOUT 50* C.
Claim 2
Dependent Claim
86 words
A PROCESS OF ELECRROPLATING RHODIUM METAL UNDER LOW INTERNAL STRESS COMPRISING ELECTRODEPOSITING RHODIUM UPON A BASIS METAL FROM AN AQUEOUS BATH CONSISTING ES-SENTIALLY OF 20-100 CC. PER LITER OF FREE SULFURIC ACID, 2 TO ABOUT 5 GRAMS PERLITER OF RHODIUM ADDED AS RHODIUM SULFATE AND 10-100 GRAMS PER LITER OF MAGNESIUM SULFATE, THE REMAINDER BEING WATER, ELECTRODEPOSITING RHODIUM FROM SAID BATH AT A CURRENT DENSITY OF FROM 4 TO 20 AMPERES PER SQUARE FOOT AND AT A TEMPERATURE OF ABOUT 20* C. TO ABOUT 50* C.
References Cited (Backward Citations)
US1949131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |