US2899294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification melting process for metal-
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:51
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/16; C22B9/22; C22B9/226; C22B34/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
THE PROCESS FOR THE PURIFICATION OF A METAL, INCLUDING ALLOYS, WHICH COMPRISES ARE MELTING A CONSUMABLE ELECTRODE OF SAID METAL, SAID ELECTRODE HAVING AN AXIAL BORE THROUGH ITS LENGTH, MAINTAINING THE PRESSURE WITHIN SAID BORE LOWER THAN THAT PREVAILING IN THE AXIS OF THE ARC PLASMA DURING THE MELTING OPERATION, REMOVING VOLATILE IMPURITIES THROUGH SAID BORE, AND RECOVERING THE PURIFIED MELT PRODUCT.
Claim 2
Dependent Claim
62 words
THE PROCESS FOR THE PURIFICATION OF A METAL, INCLUDING ALLOYS, WHICH COMPRISES ARE MELTING A CONSUMABLE ELECTRODE OF SAID METAL, SAID ELECTRODE HAVING AN AXIAL BORE THROUGH ITS LENGTH, MAINTAINING THE PRESSURE WITHIN SAID BORE LOWER THAN THAT PREVAILING IN THE AXIS OF THE ARC PLASMA DURING THE MELTING OPERATION, REMOVING VOLATILE IMPURITIES THROUGH SAID BORE, AND RECOVERING THE PURIFIED MELT PRODUCT.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |