US2955936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminothermal process for preparing calcium-aluminum alloy
Assignee: EIDP Inc
•
Filing: 1958-07-14
•
Granted: 1960-10-11
•
Expires: 1978-07-14
Abstract
No abstract record available.
Inventors
- 👤 Alden J Deyrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:31
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
THE ALUMINOTHERMAL PROCESS OF HEATING REACTANTS CONSISTING ESSENTIALLY OF CALCIUM OXIDE AND ALUMINUM FOR PREPARING CALCIUM-ALUMINUM ALLOY WHICH COMPRISES HEATING IN AN INERT ATMOSPHERE 1 TO 7 PARTS BY WEIGHT OF CALCIUM OXIDE WITH 1 PART ALUMINUM IN THE PRESENCE OF 3 TO 6 PARTS CALCIUM CHLORIDE AT A TEMPERATURE OF 640* TO 1150*C. IN A MELT TO FORM CALCIUM-ALUMINUM ALLOY, AND SEPARATING THE ALLOY FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |