Patent US3285754A successfully refreshed from Google Patents.
US3285754A
Expired / Lapsed
US
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Deposition of palladium
Assignee: Johnson Matthey PLC
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Filing: 1963-06-14
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Granted: 1966-11-15
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Expires: 1983-06-14
Abstract
No abstract record available.
Inventors
- 👤 Hopkin Norman Maynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:31
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/50; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PLATING BATH FOR THE IMMERSION OR ELECTROLESS DEPOSITION OF PALLADIUM ON A METAL BASE, SAID BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF A COMPLEX NITRITO-PALLADITE COMPOUND HAVING A GENERAL FORMULA SELECTED FROM THE GROUP: (A)2(PD(NO2)A(R'')(4-A)) AND (A)2(PD(NO2)A(R")((4-A)/2)) WHEREIN: A2 REPRESENTS A CATION SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND HYDROGEN CATIONS; R'' REPRESENTS A MONOVALENT ACID RADICLE; R" REPRESENTS A DIVALENT ACID RADICALE, AND A IS A NUMBER SELECTED FROM THE GROUP OF NUMBERS 1, 2 AND 3, SAID SOLUTION CONTAINING FROM 1 TO 30 GRAMS PER LITER OF PALLADIUM, AND SAID SOLUTION ALSO CONTAINING A BUFFERING AGENT COMPRISING AN ALKALI METAL SALT OF A WEAK ACID IN SUFFICIENT AMOUNT TO GIVE SAID SOLUTION A PH WITHIN THE RANGE OF FROM 2 TO 5.
Claim 2
Dependent Claim
128 words
A PLATING BATH FOR THE IMMERSION OR ELECTROLESS DEPOSITION OF PALLADIUM ON A METAL BASE, SAID BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF A COMPLEX NITRITO-PALLADITE COMPOUND HAVING A GENERAL FORMULA SELECTED FROM THE GROUP: (A)2(PD(NO2)A(R'')(4-A)) AND (A)2(PD(NO2)A(R")((4-A)/2)) WHEREIN: A2 REPRESENTS A CATION SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND HYDROGEN CATIONS; R'' REPRESENTS A MONOVALENT ACID RADICLE; R" REPRESENTS A DIVALENT ACID RADICALE, AND A IS A NUMBER SELECTED FROM THE GROUP OF NUMBERS 1, 2 AND 3, SAID SOLUTION CONTAINING FROM 1 TO 30 GRAMS PER LITER OF PALLADIUM, AND SAID SOLUTION ALSO CONTAINING A BUFFERING AGENT COMPRISING AN ALKALI METAL SALT OF A WEAK ACID IN SUFFICIENT AMOUNT TO GIVE SAID SOLUTION A PH WITHIN THE RANGE OF FROM 2 TO 5.
References Cited (Backward Citations)
US2720494A
Cited
US3206382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |