US2976180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of silver plating by chemical reduction
Assignee: Raytheon Co
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Filing: 1957-12-17
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Granted: 1961-03-21
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Expires: 1977-12-17
Abstract
No abstract record available.
Inventors
- 👤 Robert R Brookshire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:39
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/42; C23C18/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE METHOD OF SILVER-PLATING COMPRISING THE STEP OF CONTACTING A SURFACE TO BE PLATED WITH A PLATING SOLUTION AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 50* TO ABOUT 110*C., CONSISTING ESSENTIALLY OF AN ALKALI METAL CYANIDE, A DISSOLVED HYPOPHOSPHITE REDUCING AGENT, DISSOLVED SILVER IONS, AND AN UNDISSOLVED SILVER ION-CONTAINING COMPOUND IN CONTACT WITH THE PLATING SOLUTION, THE ION RATIO OF SAID HYPOPHOSPHITE ION TO THE UNDISSOLVED SILVER ION BEING IN THE RANGE OF FROM ABOUT 0.33 TO ABOUT 10, AND THE ION RATION OF THE CYANIDE ION OF THE DISSOLVED ALKALI METAL CYANIDE TO THE UNDISSOLVED SILVER ION BEING IN THE RANGE OF FROM ABOUT 0.1 TO 10.
Claim 2
Independent Claim
110 words
THE METHOD OF SILVER-PLATING COMPRISING THE STEP OF CONTACTING A SURFACE TO BE PLATED WITH A PLATING SOLUTION AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 50* TO ABOUT 110*C., CONSISTING ESSENTIALLY OF AN ALKALI METAL CYANIDE, A DISSOLVED HYPOPHOSPHITE REDUCING AGENT, DISSOLVED SILVER IONS, AND AN UNDISSOLVED SILVER ION-CONTAINING COMPOUND IN CONTACT WITH THE PLATING SOLUTION, THE ION RATIO OF SAID HYPOPHOSPHITE ION TO THE UNDISSOLVED SILVER ION BEING IN THE RANGE OF FROM ABOUT 0.33 TO ABOUT 10, AND THE ION RATION OF THE CYANIDE ION OF THE DISSOLVED ALKALI METAL CYANIDE TO THE UNDISSOLVED SILVER ION BEING IN THE RANGE OF FROM ABOUT 0.1 TO 10.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |