US2934460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for impregnating a carbonaceous brush with silver
Assignee: Union Carbide Corp
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Filing: 1958-03-31
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Granted: 1960-04-26
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Ramadanoff Dimiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:13
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD OF INTRODUCING AND UNIFORMLY DISTRIBUTING METALLIC SILVER IN A CARBONACEOUS BRUSH, WHICH METHOD COMPRISES IMPREGNATING THE BRUSH WITH AN AQUEOUS SOLUTION OF SILVER NITRATE AND A PRECIPITANT SELECTED FROM THE GROUP CONSISTING OF ACETONE, METHYL ALCOHOL, ETHYL ALCOHOL, ETHYLENE DIAMINE, POLYGLYCOLS, AND AN EQUAL MIXTURE OF ETHYLENE OXIDE AND PROPYLENE OXIDE, HEATING THE BRUSH TO A TEMPERATURE SUCH THAT THE SILVER NITRATE IS PRECIPITATED RAPIDLY IN SITU AND THE CONTAINED WATER IS EVAPORATED, AND SUBSEQUENTLY FURTHER HEATING THE BRUSH TO A SUFFICIENT TEMPERATURE TO REDUCE THE SILVER NITRATE TO SILVER, WHILE EVOLVING ANY ORGANIC MATTER PRESENT IN THE BRUSH.
Claim 2
Independent Claim
101 words
A METHOD OF INTRODUCING AND UNIFORMLY DISTRIBUTING METALLIC SILVER IN A CARBONACEOUS BRUSH, WHICH METHOD COMPRISES IMPREGNATING THE BRUSH WITH AN AQUEOUS SOLUTION OF SILVER NITRATE AND A PRECIPITANT SELECTED FROM THE GROUP CONSISTING OF ACETONE, METHYL ALCOHOL, ETHYL ALCOHOL, ETHYLENE DIAMINE, POLYGLYCOLS, AND AN EQUAL MIXTURE OF ETHYLENE OXIDE AND PROPYLENE OXIDE, HEATING THE BRUSH TO A TEMPERATURE SUCH THAT THE SILVER NITRATE IS PRECIPITATED RAPIDLY IN SITU AND THE CONTAINED WATER IS EVAPORATED, AND SUBSEQUENTLY FURTHER HEATING THE BRUSH TO A SUFFICIENT TEMPERATURE TO REDUCE THE SILVER NITRATE TO SILVER, WHILE EVOLVING ANY ORGANIC MATTER PRESENT IN THE BRUSH.
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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |