US3118013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety controls for electric furnaces
Assignee: Republic Steel Corp
•
Filing: 1961-02-27
•
Granted: 1964-01-14
•
Expires: 1981-02-27
Abstract
No abstract record available.
Inventors
- 👤 Robert J Garmy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:03
CPC Classifications
C; C22; C22B; C22B4/00; H; H05; H05B; H05B7/00; H05B7/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A FURNACE FOR MELTING A SUBSTANCE HAVING AT ITS MELTING POINT A CHEMICAL AFFINITY FOR AN ATMOSPHERIC GAS, COMPRISING A CRUCIBLE, MEANS FOR PRODUCING HEAT IN SAID CRUCIBLE SUFFICIENT TO MELT A CHARGE OF SAID SUBSTANCE THEREIN, MEANS FOR CONTROLLING SAID HEAT PRODUCING MEANS, MEANS SEALING SAID CRUCIBLE AGAINST THE ENTRY OF ATMOSPHERIC GASES, MEANS FOR SUPPLYING AN INERT GAS TO THE INTERIOR OF SAID CRUCIBLE, MEANS FOR CONTROLLING THE PRESSURE OF THE GAS IN THE CRUCIBLE, AND MEANS RESPONSIVE TO THE PRESSURE OF THE GAS IN THE CRUCIBLE AND OPERATIVELY CONNECTED TO SAID CONTROLLING MEANS, SAID PRESSURE RESPONSIVE MEANS BEING EFFECTIVE WHEN THE GAS PRESSURE IN SAID CRUCIBLE EXCEEDS A PREDETERMINED VALUE TO CUT OFF THE SUPPLY OF HEAT TO SAID CRUCIBLE.
Claim 2
Dependent Claim
123 words
A FURNACE FOR MELTING A SUBSTANCE HAVING AT ITS MELTING POINT A CHEMICAL AFFINITY FOR AN ATMOSPHERIC GAS, COMPRISING A CRUCIBLE, MEANS FOR PRODUCING HEAT IN SAID CRUCIBLE SUFFICIENT TO MELT A CHARGE OF SAID SUBSTANCE THEREIN, MEANS FOR CONTROLLING SAID HEAT PRODUCING MEANS, MEANS SEALING SAID CRUCIBLE AGAINST THE ENTRY OF ATMOSPHERIC GASES, MEANS FOR SUPPLYING AN INERT GAS TO THE INTERIOR OF SAID CRUCIBLE, MEANS FOR CONTROLLING THE PRESSURE OF THE GAS IN THE CRUCIBLE, AND MEANS RESPONSIVE TO THE PRESSURE OF THE GAS IN THE CRUCIBLE AND OPERATIVELY CONNECTED TO SAID CONTROLLING MEANS, SAID PRESSURE RESPONSIVE MEANS BEING EFFECTIVE WHEN THE GAS PRESSURE IN SAID CRUCIBLE EXCEEDS A PREDETERMINED VALUE TO CUT OFF THE SUPPLY OF HEAT TO SAID CRUCIBLE.
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) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |