US3153133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for heating and cutting an electrically-conductive workpiece
Assignee: Giannini Scientific Corp
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Filing: 1961-08-11
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Granted: 1964-10-13
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Expires: 1981-08-11
Abstract
No abstract record available.
Inventors
- 👤 Adriano C Ducati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:03
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; B; B23; B23K; B23K10/00; C; C22; C22B; C22B4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A METHOD OF HEATING A METAL WORKPIECE, WHICH COMPRISES PROVIDING AN ELECTRICAL PLASMA-JET TORCH HAVING A BACK ELECTRODE AND A NOZZLE ELECTRODE, EFFECTING FLOW OF GAS THROUGH SAID TORCH AND OUT THE NOZZLE OPENING IN SAID NOZZLE ELECTRODE TO THE VICINITY OF A METAL WORKPIECE, MAINTAINING A FIRST HIGH-CURRENT ELECTRIC ARC THROUGH SAID GAS BETWEEN SAID BACK ELECTRODE AND SAID WORKPIECE, AND CONCURRENTLY MAINTAINING A SECOND HIGH-CURRENT ELECTRIC
Claim 2
Independent Claim
68 words
A METHOD OF HEATING A METAL WORKPIECE, WHICH COMPRISES PROVIDING AN ELECTRICAL PLASMA-JET TORCH HAVING A BACK ELECTRODE AND A NOZZLE ELECTRODE, EFFECTING FLOW OF GAS THROUGH SAID TORCH AND OUT THE NOZZLE OPENING IN SAID NOZZLE ELECTRODE TO THE VICINITY OF A METAL WORKPIECE, MAINTAINING A FIRST HIGH-CURRENT ELECTRIC ARC THROUGH SAID GAS BETWEEN SAID BACK ELECTRODE AND SAID WORKPIECE, AND CONCURRENTLY MAINTAINING A SECOND HIGH-CURRENT ELECTRIC
References Cited (Backward Citations)
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US2806124A
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US3075066A
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US2922869A
Cited
US3004189A
Cited
US3083289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |