Patent US3294572A successfully refreshed from Google Patents.
US3294572A
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US
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Impregnation of carbon with silver
Assignee: Pittsburgh Activated Carbon Co
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Filing: 1963-03-08
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Granted: 1966-12-27
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Expires: 1983-03-08
Abstract
No abstract record available.
Inventors
- 👤 Piccione Salvatore
- 👤 John E Urbanic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:28
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD OF IMPREGNATING ACTIVATED CARBON WITH SILVER COMPRISING TREATING THE ACTIVATED CARBON WITH AN ACID SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, CHLORIC ACID, PERCHLORIC ACID, FLUROGALLIC ACID, HYDROFLUORIC ACID, LACTIC ACID, FLUOROSILLICIC ACID AND SALICYCLIC ACID AND IMPREGNATING THE ACTIVATED CARBON WITH AN AQUEOUS SOLUTION OF A SILVER SALT AND THEN CONVERTING THE SILVER SALT TO METALLIC SILVER, SAID ACID TREATMENT BEING AT LEAST AS EARLY AS THE ADDITION OF THE SILVER SALT SOLUTION.
Claim 2
Independent Claim
77 words
A METHOD OF IMPREGNATING ACTIVATED CARBON WITH SILVER COMPRISING TREATING THE ACTIVATED CARBON WITH AN ACID SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, CHLORIC ACID, PERCHLORIC ACID, FLUROGALLIC ACID, HYDROFLUORIC ACID, LACTIC ACID, FLUOROSILLICIC ACID AND SALICYCLIC ACID AND IMPREGNATING THE ACTIVATED CARBON WITH AN AQUEOUS SOLUTION OF A SILVER SALT AND THEN CONVERTING THE SILVER SALT TO METALLIC SILVER, SAID ACID TREATMENT BEING AT LEAST AS EARLY AS THE ADDITION OF THE SILVER SALT SOLUTION.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |