Patent US2828227A successfully refreshed from Google Patents.
US2828227A
Expired / Lapsed
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Electroless deposition of vanadium alloys
Assignee: GTE Sylvania Inc
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Filing: 1956-03-30
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Granted: 1958-03-25
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Expires: 1976-03-30
Abstract
No abstract record available.
Inventors
- 👤 Philip H Eisenberg
- 👤 Douglas O Raleigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:29
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/48; C23C18/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
AN ELECTROLESS PLATING BATH CONTAINING IN AQUEOUS ALKALINE SOLUTION, A VANADIUM SALT; A SALT OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF IRON, NICKEL, COBALT AND CHROMIUM, THE POSITIVE IONS OF THE VANADIUM AND METAL SALTS BEING IN THEIR LOWEST IONIC VALENCE STATE, THE COMBINED CONCENTRATION OF SAID VANADIUM SALT AND SAID ONE METAL SALT FALLING WITHIN THE APPROXIMATE RANGE 50-53 GRAMS PER LITER; A HYPOPHOSPHITE SALT HAVING A CONCENTRATION FALLING WITHIN THE APPROXIMATE RANGE 10-20 GRAMS PER LITER; A BUFFERING AGENT; AND AT LEAST ONE REDUCING AND COMPLEXING AGENT WHICH MAINTAINS SAID POSITIVE IONS IN THEIR LOWEST VALENCE STATES AND ALSO FORMS AT LEAST ONE COMPLEX WITH SAID IONS WHICH IS READILY REDUCIBLE TO AN ALLOY COMPOSED OF VANADIUM AND SAID SELECTED METAL WHEN AN ELECTROLESS DEPOSITION OPERATION IS INTENDED, SAID AGENT BEING SELECTED FROM THE GROUP CONSISTING OF OXALIC ACID AND ITS SALTS, SAID AGENT HAVING A CONCENTRATION FALLING WITHIN THE APPROXIMATE RANGE 9-20 GRAMS PER LITER.
Claim 2
Dependent Claim
162 words
AN ELECTROLESS PLATING BATH CONTAINING IN AQUEOUS ALKALINE SOLUTION, A VANADIUM SALT; A SALT OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF IRON, NICKEL, COBALT AND CHROMIUM, THE POSITIVE IONS OF THE VANADIUM AND METAL SALTS BEING IN THEIR LOWEST IONIC VALENCE STATE, THE COMBINED CONCENTRATION OF SAID VANADIUM SALT AND SAID ONE METAL SALT FALLING WITHIN THE APPROXIMATE RANGE 50-53 GRAMS PER LITER; A HYPOPHOSPHITE SALT HAVING A CONCENTRATION FALLING WITHIN THE APPROXIMATE RANGE 10-20 GRAMS PER LITER; A BUFFERING AGENT; AND AT LEAST ONE REDUCING AND COMPLEXING AGENT WHICH MAINTAINS SAID POSITIVE IONS IN THEIR LOWEST VALENCE STATES AND ALSO FORMS AT LEAST ONE COMPLEX WITH SAID IONS WHICH IS READILY REDUCIBLE TO AN ALLOY COMPOSED OF VANADIUM AND SAID SELECTED METAL WHEN AN ELECTROLESS DEPOSITION OPERATION IS INTENDED, SAID AGENT BEING SELECTED FROM THE GROUP CONSISTING OF OXALIC ACID AND ITS SALTS, SAID AGENT HAVING A CONCENTRATION FALLING WITHIN THE APPROXIMATE RANGE 9-20 GRAMS PER LITER.
References Cited (Backward Citations)
US2532283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |