US3309564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc welding apparatus having plasma generator for starting
Assignee: Airco Inc
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Filing: 1963-12-26
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Granted: 1967-03-14
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Expires: 1983-12-26
Abstract
No abstract record available.
Inventors
- 👤 Stephen D Poulsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:40
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/06; B23K9/067; B23K9/0672; B23K9/0676; H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN AN ELECTRIC ARC WELDING APPARATUS HAVING TWO ELECTRODES SPACED APART TO FORM AN ARC GAP, IN COMBINATION, A HIGH FREQUENCY SOURCE, A SHIELDED HIGH FREQUENCY TRANSMISSION LINE, VOLTAGE STEP-DOWN MEANS CONNECTING SAID SOURCE TO ONE END OF SAID LINE, A PLASMA TORCH ELECTRICALLY SEPARATE FROM THE REMAINDER OF THE ELECTRIC ARC APPARATUS, VOLTAGE STEP-UP MEANS CONNECTING THE OTHER END OF SAID LINE TO SAID TORCH, AND MEANS TO PROJECT A PLASMA FLAME FROM SAID TORCH TO THE REGION OF THE ARC GAP
Claim 2
Dependent Claim
83 words
IN AN ELECTRIC ARC WELDING APPARATUS HAVING TWO ELECTRODES SPACED APART TO FORM AN ARC GAP, IN COMBINATION, A HIGH FREQUENCY SOURCE, A SHIELDED HIGH FREQUENCY TRANSMISSION LINE, VOLTAGE STEP-DOWN MEANS CONNECTING SAID SOURCE TO ONE END OF SAID LINE, A PLASMA TORCH ELECTRICALLY SEPARATE FROM THE REMAINDER OF THE ELECTRIC ARC APPARATUS, VOLTAGE STEP-UP MEANS CONNECTING THE OTHER END OF SAID LINE TO SAID TORCH, AND MEANS TO PROJECT A PLASMA FLAME FROM SAID TORCH TO THE REGION OF THE ARC GAP
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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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |