US2920052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver catalyst and method of manufacture
Assignee: Dow Chemical Co
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Filing: 1956-09-21
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Granted: 1960-01-05
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Expires: 1976-09-21
Abstract
No abstract record available.
Inventors
- 👤 George R Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:27
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50; Y; Y10; Y10S; Y10S502/00; Y10S502/506; Y10S502/513
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR MANUFACTURING A SUPPORTED SILVER CATALYST OF THE GROUP CONSISTING OF PROMOTED AND UNPROMOTED CATALYSTS WHICH CONSISTS IN HEATING A POLYHYDRIC ALCOHOL COMPOUND-WETTED MIXTURE CONSISTING OF A PARTICULATE INERT SUPPORT AND AT LEAST ONE REDUCIBLE SOLID SILVER COMPOUND OF THE GROUP CONSISTING OF SILVER OCIDE, SILVER CARBONATE, SILVER OXALATE AND COMBINATION THEREOF WITH A PROMOTER TO A REACTION TEMPERATURE BETWEEN 110*C. AND 200*C. FOR A TIME SUFFICENT TO REDUCE THE SILVER COMPOUND TO METALLIC SILVER AND TO VAPORIZE VOLATILE REACTION PRODUCTS THE METALLIC SILVER BEING IN A MOSSY, PARTICULATE FORM AND HAVING IMPROVED ADHESION TO THE SUPPORT.
Claim 2
Dependent Claim
99 words
A PROCESS FOR MANUFACTURING A SUPPORTED SILVER CATALYST OF THE GROUP CONSISTING OF PROMOTED AND UNPROMOTED CATALYSTS WHICH CONSISTS IN HEATING A POLYHYDRIC ALCOHOL COMPOUND-WETTED MIXTURE CONSISTING OF A PARTICULATE INERT SUPPORT AND AT LEAST ONE REDUCIBLE SOLID SILVER COMPOUND OF THE GROUP CONSISTING OF SILVER OCIDE, SILVER CARBONATE, SILVER OXALATE AND COMBINATION THEREOF WITH A PROMOTER TO A REACTION TEMPERATURE BETWEEN 110*C. AND 200*C. FOR A TIME SUFFICENT TO REDUCE THE SILVER COMPOUND TO METALLIC SILVER AND TO VAPORIZE VOLATILE REACTION PRODUCTS THE METALLIC SILVER BEING IN A MOSSY, PARTICULATE FORM AND HAVING IMPROVED ADHESION TO THE SUPPORT.
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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |