Patent US2730429A successfully refreshed from Google Patents.
US2730429A
Expired / Lapsed
US
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Method of making substantially pure
Assignee: —
•
Filing: —
•
Granted: 1956-01-10
•
Expires: 1973-01-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:47
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/14; C01P; C01P2004/00; C01P2004/60; C01P2004/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF MAKING SUBSTANTIALLY PURE CRYSTALLINE CUPRIC DIAMMINO CARBONATE WHICH COMPRISES LEACHING METALLIC COPPER-CONTAINING MATERIAL WITH AN AQUEOUS SOLUTION OF AMMONIUM CARBONATE CONTAINING CUPRIC IONS UNTIL A SUBSTANTIALLY SATURATED SOLUTION OF CUPRIC-CUPROUS DIAMMINO CARBONATE IS OBTAINED, CONTACTING SAID SOLUTION WITH AN OXIDIZING AGENT FOR A TIME SUFFICIENT TO CONVERT SAID SOLUTION TO A SUPERSATURATED SOLUTION OF CUPRIC DIAMMINO CARBONATE, CRYSTALLIZING SAID CUPRIC DIAMMINO CARBONATE FROM SAID SOLUTION THEREBY PRODUCING SUBSTANTIALLY PURE CRYSTALS OF CUPRIC DIAMMINO CARBONATE AND SEPARATING THE CRYSTALS FROM THE LIQUID.
Claim 2
Independent Claim
84 words
THE METHOD OF MAKING SUBSTANTIALLY PURE CRYSTALLINE CUPRIC DIAMMINO CARBONATE WHICH COMPRISES LEACHING METALLIC COPPER-CONTAINING MATERIAL WITH AN AQUEOUS SOLUTION OF AMMONIUM CARBONATE CONTAINING CUPRIC IONS UNTIL A SUBSTANTIALLY SATURATED SOLUTION OF CUPRIC-CUPROUS DIAMMINO CARBONATE IS OBTAINED, CONTACTING SAID SOLUTION WITH AN OXIDIZING AGENT FOR A TIME SUFFICIENT TO CONVERT SAID SOLUTION TO A SUPERSATURATED SOLUTION OF CUPRIC DIAMMINO CARBONATE, CRYSTALLIZING SAID CUPRIC DIAMMINO CARBONATE FROM SAID SOLUTION THEREBY PRODUCING SUBSTANTIALLY PURE CRYSTALS OF CUPRIC DIAMMINO CARBONATE AND SEPARATING THE CRYSTALS FROM THE LIQUID.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |