US3280294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc welding of aluminum
Assignee: General Cable Corp
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Filing: 1965-01-28
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Granted: 1966-10-18
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Expires: 1985-01-28
Abstract
No abstract record available.
Inventors
- 👤 Fred F Polizzano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:10
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN THE WELDING OF ALUMINUM BY A DIRECT-CURRENT ELECTRIC ARC WITH THE WORKPIECE OF POSITIVE POLARITY, THE IMPROVEMENT WHICH COMPRISES DISCHARGING THE ARC FROM AN ELECTRODE TO THE WORKPICE THROUGH THE PLASMA OF AN IONIZED INERT SHIELDING GAS, REDUCING THE COLLISIONS OF THE ELECTRONS WITH THE IONS IN THE PLASMA BY MAINTAINING THE ELECTRODE WITHIN ABOUT 0.020 INCH OF THE WORKPIECE, AND MAINTAINING A CURRENT DENSITY OF THE ELECTRON BOMBARDMENT OF THE WORKPIECE SUCH THAT SCOURING OF OXIDE COATING FROM THE ALUMINUM TO BE WELDED IS EFFECTED BEFORE THE METAL IS MELTED BY THE ARC.
Claim 2
Dependent Claim
95 words
IN THE WELDING OF ALUMINUM BY A DIRECT-CURRENT ELECTRIC ARC WITH THE WORKPIECE OF POSITIVE POLARITY, THE IMPROVEMENT WHICH COMPRISES DISCHARGING THE ARC FROM AN ELECTRODE TO THE WORKPICE THROUGH THE PLASMA OF AN IONIZED INERT SHIELDING GAS, REDUCING THE COLLISIONS OF THE ELECTRONS WITH THE IONS IN THE PLASMA BY MAINTAINING THE ELECTRODE WITHIN ABOUT 0.020 INCH OF THE WORKPIECE, AND MAINTAINING A CURRENT DENSITY OF THE ELECTRON BOMBARDMENT OF THE WORKPIECE SUCH THAT SCOURING OF OXIDE COATING FROM THE ALUMINUM TO BE WELDED IS EFFECTED BEFORE THE METAL IS MELTED BY THE ARC.
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 |