US2630370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zirconium compound and method of precipitation
Assignee: Individual
•
Filing: 1948-04-28
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Granted: 1953-03-03
•
Expires: 1968-04-28
Abstract
No abstract record available.
Inventors
- 👤 Charles A Kumins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:48
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/02; C; C01; C01G; C01G25/00; C01G25/003; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/32; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
METHOD FOR QUANTITATIVELY PRECIPITATING AND SEPARATING ZIRCONIUM FROM CATIONIC IMPURITIES, WHICH COMPRISES ADDING AT LEAST THE STOICHIOMETRIC EQUIVALENT OF MANDELIC ACID TO AN AQUEOUS ACIDIC SOLUTION COMPRISING ZIRCONIUM UNDER NONOXIDIZING CONDITIONS, AND SEPARATING THE PRECIPITATED ZIRCONIUM TETRAMANDELATE.
Claim 2
Dependent Claim
37 words
METHOD FOR QUANTITATIVELY PRECIPITATING AND SEPARATING ZIRCONIUM FROM CATIONIC IMPURITIES, WHICH COMPRISES ADDING AT LEAST THE STOICHIOMETRIC EQUIVALENT OF MANDELIC ACID TO AN AQUEOUS ACIDIC SOLUTION COMPRISING ZIRCONIUM UNDER NONOXIDIZING CONDITIONS, AND SEPARATING THE PRECIPITATED ZIRCONIUM TETRAMANDELATE.
References Cited (Backward Citations)
US2498514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |