US2879175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a silver coating on a non metallic material
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1954-10-20
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Granted: 1959-03-24
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Expires: 1974-10-20
Abstract
No abstract record available.
Inventors
- 👤 Umblia Elmar Johannes
- 👤 Schulze Ernst Ake Lennart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:47
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/42; C23C18/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A METHOD OF COATING A NON-METALLIC SURFACE WITH A FILM OF METALLIC SILVER WHICH COMPRISES: ACTIVATING SAID SURFACE FIRST WITH A SOLUTION CONTAINING DIVALENT TIN IONS AND SECONDLY WITH A SOLUTION CONTAINING SILVER IONS; FOLLOWED BY EXPOSING THE THUS-ACTIVATED SURFACE TO A SILVERING SOLUTIN CONTAINING A COMPLEX SILVER COMPOUND WHEREIN THE CONCENTRATION OF THE SILVER IONS DOES NOT EXCEED 10-6 GRAMIONS/L., HYDROXYL IONS IN A CONCENTRATION THAT DOES NOT EXCEED 10-3 GRAMIONS/L., A REDUCING AGENT ACTIVE ONLY IN ALKALINE SOLUTION; AND THEN ADDING TO THE SAID SILVERING SOLUTION AN ALKALINE SUBSTANCE TO INCREASE THE HYDROXYL ION CONCENTRATION IN THE SILVERING SOLUTION TO EXCEED 10-3 GRAMIONS/L., WHEREBY SILVER FROM SAID SILVERING SOLUTION IS DEPOSITED SELECTIVELY ON THE SAID ACTIVATED SURFACE.
Claim 2
Independent Claim
119 words
A METHOD OF COATING A NON-METALLIC SURFACE WITH A FILM OF METALLIC SILVER WHICH COMPRISES: ACTIVATING SAID SURFACE FIRST WITH A SOLUTION CONTAINING DIVALENT TIN IONS AND SECONDLY WITH A SOLUTION CONTAINING SILVER IONS; FOLLOWED BY EXPOSING THE THUS-ACTIVATED SURFACE TO A SILVERING SOLUTIN CONTAINING A COMPLEX SILVER COMPOUND WHEREIN THE CONCENTRATION OF THE SILVER IONS DOES NOT EXCEED 10-6 GRAMIONS/L., HYDROXYL IONS IN A CONCENTRATION THAT DOES NOT EXCEED 10-3 GRAMIONS/L., A REDUCING AGENT ACTIVE ONLY IN ALKALINE SOLUTION; AND THEN ADDING TO THE SAID SILVERING SOLUTION AN ALKALINE SUBSTANCE TO INCREASE THE HYDROXYL ION CONCENTRATION IN THE SILVERING SOLUTION TO EXCEED 10-3 GRAMIONS/L., WHEREBY SILVER FROM SAID SILVERING SOLUTION IS DEPOSITED SELECTIVELY ON THE SAID ACTIVATED SURFACE.
References Cited (Backward Citations)
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US1324690A
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US2303871A
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US2363354A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |