US2562858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver-calcium catalyst and its preparation
Assignee: National Research Council Canada
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Filing: 1951-03-14
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Granted: 1951-07-31
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Expires: 1971-03-14
Abstract
No abstract record available.
Inventors
- 👤 Cambron Adrien
- 👤 Francis L W Mckim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:19
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A METHOD OF PRODUCING AN OXIDATION CATALYST WHICH COMPRISES ALLOYING FROM 1 TO 15% OF AN ALKALINE EARTH METAL WITH SILVER AND SUBJECTING THE ALLOY TO REMOVAL OF AT LEAST 5% OF THE ALKALINE EARTH CONTENT TO FORM AN ACTIVE CATALYST WITHOUT SIGNIFICANT REMOVAL OF SILVER.
Claim 2
Independent Claim
46 words
A METHOD OF PRODUCING AN OXIDATION CATALYST WHICH COMPRISES ALLOYING FROM 1 TO 15% OF AN ALKALINE EARTH METAL WITH SILVER AND SUBJECTING THE ALLOY TO REMOVAL OF AT LEAST 5% OF THE ALKALINE EARTH CONTENT TO FORM AN ACTIVE CATALYST WITHOUT SIGNIFICANT REMOVAL OF SILVER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-30 | 1955-01-29 | 1955-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-30 | 1959-01-29 | 1959-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-30 | 1963-01-29 | 1963-07-31 | $7700.00 | Window Closed / Lapsed |