Patent US3130292A successfully refreshed from Google Patents.
US3130292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc torch apparatus for use in metal melting furnaces
Assignee: Union Carbide Corp
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Filing: 1960-12-27
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Granted: 1964-04-21
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Expires: 1980-12-27
Abstract
No abstract record available.
Inventors
- 👤 Robert M Gage
- 👤 George M Skinner
- 👤 William F Cuddihy
- 👤 Donald W Sundstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:23
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A NON-CONSUMABLE TRANSFERRED ARC TORCH DEVICE PRODUCING A DIRECTIONALLY STABILIZED QUASI-ELECTRODE FOR HEATING A METAL MELTING FURNACE WHICH COMPRISES FIVE CONCENTRIC TUBES DEFINING THEREBETWEEN A CENTRAL PASSAGE AND FIRST, SECOND, THIRD AND FOURTH ANNULAR PASSAGES RESPECTIVELY, NOZZLE MEANS HAVING A RELATIVELY WIDE INLET PORTION AND A CONSTRICTED OUTLET CONNECTED TO AND PROVIDING AN END CLOSURE FOR THE OUTER THREE TUBES AT ONE END THEREOF AND FURTHER PROVIDING FOR COMMUNICATION BETWEEN THE THIRD AND FOURTH ANNULAR PASSAGES, ELECTRODE MOUNTING MEANS CONNECTED TO THE SAME END OF THE TWO INNER TUBES PROVIDING AN END CLOSURE THEREFOR AND FURTHER PROVIDING FOR COMMUNICATIONS BETWEEN SAID CENTRAL PASSAGE AND SAID FIRST ANNULAR PASSAGE, MEANS AT THE OTHER ENDS OF SAID TUBES PROVIDING COOLANT INLET AND OUTLET FLOW PATHS FOR THE CEN-
Claim 2
Dependent Claim
126 words
A NON-CONSUMABLE TRANSFERRED ARC TORCH DEVICE PRODUCING A DIRECTIONALLY STABILIZED QUASI-ELECTRODE FOR HEATING A METAL MELTING FURNACE WHICH COMPRISES FIVE CONCENTRIC TUBES DEFINING THEREBETWEEN A CENTRAL PASSAGE AND FIRST, SECOND, THIRD AND FOURTH ANNULAR PASSAGES RESPECTIVELY, NOZZLE MEANS HAVING A RELATIVELY WIDE INLET PORTION AND A CONSTRICTED OUTLET CONNECTED TO AND PROVIDING AN END CLOSURE FOR THE OUTER THREE TUBES AT ONE END THEREOF AND FURTHER PROVIDING FOR COMMUNICATION BETWEEN THE THIRD AND FOURTH ANNULAR PASSAGES, ELECTRODE MOUNTING MEANS CONNECTED TO THE SAME END OF THE TWO INNER TUBES PROVIDING AN END CLOSURE THEREFOR AND FURTHER PROVIDING FOR COMMUNICATIONS BETWEEN SAID CENTRAL PASSAGE AND SAID FIRST ANNULAR PASSAGE, MEANS AT THE OTHER ENDS OF SAID TUBES PROVIDING COOLANT INLET AND OUTLET FLOW PATHS FOR THE CEN-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |