US2945756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc resistance furnace and method of melting refractory materials
Assignee: Individual
•
Filing: 1959-04-20
•
Granted: 1960-07-19
•
Expires: 1979-04-20
Abstract
No abstract record available.
Inventors
- 👤 James S Ballantine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:19
CPC Classifications
C; C22; C22B; C22B4/00; H; H05; H05B; H05B3/00; H05B3/62; H05B3/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
AN ELECTRIC ARE RESISTANCE FURNACE, COMPRISING A PLURALITY OF REFRACTORY COMBINED ARCING AND RESISTOR RINGS ARRANGED IN CONTACT END TO END IN A STACK, TERMINALS CONNECTED AT EACH END TO THE STACK OF RINGS, A SOURCE OF ELECTRIC CURRENT CONNECTED TO THE TERMINALS ACROSS THROUGH THE STACK, AND MEANS FOR MAINTAINING PRESSURE ON THE STACK IN THE RANGE BETWEEN 10 AND 150 P.S.I.
Claim 2
Dependent Claim
63 words
AN ELECTRIC ARE RESISTANCE FURNACE, COMPRISING A PLURALITY OF REFRACTORY COMBINED ARCING AND RESISTOR RINGS ARRANGED IN CONTACT END TO END IN A STACK, TERMINALS CONNECTED AT EACH END TO THE STACK OF RINGS, A SOURCE OF ELECTRIC CURRENT CONNECTED TO THE TERMINALS ACROSS THROUGH THE STACK, AND MEANS FOR MAINTAINING PRESSURE ON THE STACK IN THE RANGE BETWEEN 10 AND 150 P.S.I.
References Cited (Backward Citations)
US984119A
Cited
US1023309A
Cited
US1177680A
Cited
GB169756A
Cited
US1663810A
Cited
US2402582A
Cited
FR915619A
Cited
US2657247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |