Patent US3279912A successfully refreshed from Google Patents.
US3279912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating molten metals with multiple electric arc columns
Assignee: Union Carbide Corp
•
Filing: 1962-10-02
•
Granted: 1966-10-18
•
Expires: 1982-10-02
Abstract
No abstract record available.
Inventors
- 👤 Frank S Death
- 👤 Jr Walter B Farnsworth
- 👤 David A Haid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:39
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/16; C22B9/22; C22B9/226
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A METALLURGICAL PROCESS COMPRISING ESTABLISHING AT A GIVEN OPTIMUM CURRENT LEVEL AND A DESIRED POWER LEVEL, IN ELECTRICAL CIRCUIT WITH A POWER SUPPLY AT LEAST ONE HEATING ELECTRIC ARC COLUMN AND AT LEAST ONE TREATING ELCETRIC ARC COLUMN, SAID ELECTRIC ARC COLUMNS BEING ESSENTIALLY DIRECTIONALLY STABLE ELECTRIC ARC COLUMNS CONATAINING PARTIALLY IONIZED GAS AND SAID TREATING ELECTRIC ARC COLUMN ESSENTIALLY CONTAINING AT LEAST ONE PARTIALLY IONIZED METAL REFINING GAS; REDUCING THE LENGTH OF THE TREATING GAS IN UM TO EFFECT EFFICIENT UTLIZATION OF SAID REFINING GAS IN TREATING SAID MOLTEN METAL WHILE CONCURRENTLY INCREASING THE LENGTH OF SAID HEATING ARC COLUMN TO SUBSTANTIALLY MAINTAIN SAID DESIRED POWER LEVEL AT SAID GIVEN OPTIMUM CURRENT LEVE.
Claim 2
Dependent Claim
114 words
A METALLURGICAL PROCESS COMPRISING ESTABLISHING AT A GIVEN OPTIMUM CURRENT LEVEL AND A DESIRED POWER LEVEL, IN ELECTRICAL CIRCUIT WITH A POWER SUPPLY AT LEAST ONE HEATING ELECTRIC ARC COLUMN AND AT LEAST ONE TREATING ELCETRIC ARC COLUMN, SAID ELECTRIC ARC COLUMNS BEING ESSENTIALLY DIRECTIONALLY STABLE ELECTRIC ARC COLUMNS CONATAINING PARTIALLY IONIZED GAS AND SAID TREATING ELECTRIC ARC COLUMN ESSENTIALLY CONTAINING AT LEAST ONE PARTIALLY IONIZED METAL REFINING GAS; REDUCING THE LENGTH OF THE TREATING GAS IN UM TO EFFECT EFFICIENT UTLIZATION OF SAID REFINING GAS IN TREATING SAID MOLTEN METAL WHILE CONCURRENTLY INCREASING THE LENGTH OF SAID HEATING ARC COLUMN TO SUBSTANTIALLY MAINTAIN SAID DESIRED POWER LEVEL AT SAID GIVEN OPTIMUM CURRENT LEVE.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |