US2665192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of cuprous oxide
Assignee: Mountain Copper Co Ltd
•
Filing: 1951-01-23
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Granted: 1954-01-05
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Expires: 1971-01-23
Abstract
No abstract record available.
Inventors
- 👤 Rowe Percy John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:44
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/02; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/60; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR PRODUCTION OF FINELY DIVIDED CUPROUS OXIDE COMPRISING ADDING SULFUR DIOXIDE TO AN ALKALINE AQUEOUS SLURRY OF FINELY DIVIDED SOLID CUPRIC HYDROXIDE IN AN AMOUNT SUFFICIENT TO CONVERT CUPRIC HYDROXIDE TO SOLID CUPROUS SULFITE IN AN ACID AQUEOUS SLURRY, AND HEATING AT A TEMPERATURE OF FROM 15* TO 70* C. THE SO FORMED SOLID CUPROUS SULPHITE IN THE ACID AQUEOUS SLURRY HAVING AN ACIDITY BETWEEN THE EQUIVALENT OF 1 TO 12 GRAMS PER LITER OF SULFURIC ACID TO DECOMPOSE THE SULFITE TO FINELY DIVIDE CUPROUS OXIDE SUBSTANTIALLY FREE OF METALLIC COPPER.
Claim 2
Dependent Claim
93 words
A PROCESS FOR PRODUCTION OF FINELY DIVIDED CUPROUS OXIDE COMPRISING ADDING SULFUR DIOXIDE TO AN ALKALINE AQUEOUS SLURRY OF FINELY DIVIDED SOLID CUPRIC HYDROXIDE IN AN AMOUNT SUFFICIENT TO CONVERT CUPRIC HYDROXIDE TO SOLID CUPROUS SULFITE IN AN ACID AQUEOUS SLURRY, AND HEATING AT A TEMPERATURE OF FROM 15* TO 70* C. THE SO FORMED SOLID CUPROUS SULPHITE IN THE ACID AQUEOUS SLURRY HAVING AN ACIDITY BETWEEN THE EQUIVALENT OF 1 TO 12 GRAMS PER LITER OF SULFURIC ACID TO DECOMPOSE THE SULFITE TO FINELY DIVIDE CUPROUS OXIDE SUBSTANTIALLY FREE OF METALLIC COPPER.
References Cited (Backward Citations)
US1358619A
Cited
US1147466A
Cited
US2409413A
Cited
US2385078A
Cited
US2385066A
Cited
US2474497A
Cited
US2474533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |