US3334995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of precipitating silver
Assignee: 3M Co
•
Filing: 1961-07-31
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Granted: 1967-08-08
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Gaspar Bela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:26
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50; G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/8255
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
THE PROCESS WHICH COMPRISES REACTING IN AQUEOUS SOLUTION A SOLUBLE SILVER SALT WITH A SOLUBLE SALT OF A BOROHYDRIDE, THE CONCENTRATION OF SAID SILVER SALT AND SAID BOROHYDRIDE SALT IN SAID SOLUTION BEING IN THE RANGE OF ABOUT .001 TO ABOUT .03 NORMAL, AND SAID SOLUTION BEING MAINTAINED AT A TEMPERATURE BELOW ABOUT 20*C., AND REDUCING SAID SILVER SALT TO COLLOIDAL SILVER.
Claim 2
Dependent Claim
62 words
THE PROCESS WHICH COMPRISES REACTING IN AQUEOUS SOLUTION A SOLUBLE SILVER SALT WITH A SOLUBLE SALT OF A BOROHYDRIDE, THE CONCENTRATION OF SAID SILVER SALT AND SAID BOROHYDRIDE SALT IN SAID SOLUTION BEING IN THE RANGE OF ABOUT .001 TO ABOUT .03 NORMAL, AND SAID SOLUTION BEING MAINTAINED AT A TEMPERATURE BELOW ABOUT 20*C., AND REDUCING SAID SILVER SALT TO COLLOIDAL SILVER.
References Cited (Backward Citations)
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Cited
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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) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |