US2543407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of calcium in admixture with sodium
Assignee: Ethyl Corp
•
Filing: 1949-05-10
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Granted: 1951-02-27
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Expires: 1969-05-10
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Hill
- 👤 Soroos Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:55
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS OF RECOVERING CALCIUM METAL FROM ADMIXTURE WITH SODIUM METAL COMPRISING TREATING SAID MIXTURE WITH A LOWER ALIPHATIC ALCOHOL IN THE PRESENCE OF WATER IN AN AMOUNT LESS THAN 50 PER CENT BY WEIGHT BASED ON THE AMOUNT THAN ALCOHOL USED AND THEN SEPARATING THE UNDISSOLVED CALCIUM METAL FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
53 words
A PROCESS OF RECOVERING CALCIUM METAL FROM ADMIXTURE WITH SODIUM METAL COMPRISING TREATING SAID MIXTURE WITH A LOWER ALIPHATIC ALCOHOL IN THE PRESENCE OF WATER IN AN AMOUNT LESS THAN 50 PER CENT BY WEIGHT BASED ON THE AMOUNT THAN ALCOHOL USED AND THEN SEPARATING THE UNDISSOLVED CALCIUM METAL FROM THE REACTION MIXTURE.
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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |