Patent US2827398A successfully refreshed from Google Patents.
US2827398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroless iron plating
Assignee: GTE Sylvania Inc
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Filing: 1956-01-26
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Granted: 1958-03-18
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Expires: 1976-01-26
Abstract
No abstract record available.
Inventors
- 👤 Philip H Eisenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:57
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
THE METHOD FOR ELECTROLESSLY DEPOSITING AN IRON COATING ON THE SURFACE OF A METALLIC SUBSTRATE, WHICH COMPRISES THE STEPS OF INSERTING SAID SUBSTRATE INTO AN ELECTROLESS PLATING BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION CONTAINING AT LEAST ONE FERROUS SALT HAVING A CONCENTRATION OF APPROXIMATELY 30 GRAMS PER LITER, A HYPOPHOSPHITE SALT HAVING A CONCENTRATION OF APPROXIMATELY 10 GRAMS PER LITER, AND AT LEAST ONE BUFFERING AND SEQUESTERING AGENT SOLUBLE IN THE BATH, SAID AGENT BEING SELECTED FROM AT LEAST ONE ELEMENT OF THE GROUP CONSISTING OF OXALIC ACID AND ITS SALTS, CITRIC ACID AND ITS SALTS AND ROCHELLE SALTS, THE CONCENTRATION OF SAID AGENT FALLING WITHIN THE APPROXIMATE RANGE 25-100 GRAMS PER LITER, AND MAINTAINING THE PH OF SAID BATH IN THE BASIC REGION UNTIL THE ELECTROLESS DEPOSITION IS CARRIED TO COMPLETION.
Claim 2
Independent Claim
133 words
THE METHOD FOR ELECTROLESSLY DEPOSITING AN IRON COATING ON THE SURFACE OF A METALLIC SUBSTRATE, WHICH COMPRISES THE STEPS OF INSERTING SAID SUBSTRATE INTO AN ELECTROLESS PLATING BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION CONTAINING AT LEAST ONE FERROUS SALT HAVING A CONCENTRATION OF APPROXIMATELY 30 GRAMS PER LITER, A HYPOPHOSPHITE SALT HAVING A CONCENTRATION OF APPROXIMATELY 10 GRAMS PER LITER, AND AT LEAST ONE BUFFERING AND SEQUESTERING AGENT SOLUBLE IN THE BATH, SAID AGENT BEING SELECTED FROM AT LEAST ONE ELEMENT OF THE GROUP CONSISTING OF OXALIC ACID AND ITS SALTS, CITRIC ACID AND ITS SALTS AND ROCHELLE SALTS, THE CONCENTRATION OF SAID AGENT FALLING WITHIN THE APPROXIMATE RANGE 25-100 GRAMS PER LITER, AND MAINTAINING THE PH OF SAID BATH IN THE BASIC REGION UNTIL THE ELECTROLESS DEPOSITION IS CARRIED TO COMPLETION.
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) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |