US3272959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc torches
Assignee: Victor Equipment Co
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Filing: 1965-02-24
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Granted: 1966-09-13
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Expires: 1985-02-24
Abstract
No abstract record available.
Inventors
- 👤 James A Browning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/3452; H05H1/3484
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN AN ELECTRIC ARC TORCH HAVING AN ARC GAP, THE METHOD OF INITIATING AN ARC IN SAID TORCH COMPRISING APPLYING A VOLTAGE ACROSS SAID GAP, SAID VOLTAGE BEING BELOW THE BREAKDOWN VALVE REGUIRED TO BRIDGE SAID GAP AT SUBSTANTIALLY ONE ATMOSPHERE; AND REDUCING THE FLUID PRESSURE IN THE REGION OF SAID GAP UNTIL AN ARC IS STRUCK ACROSS SAID GAP.
Claim 2
Dependent Claim
60 words
IN AN ELECTRIC ARC TORCH HAVING AN ARC GAP, THE METHOD OF INITIATING AN ARC IN SAID TORCH COMPRISING APPLYING A VOLTAGE ACROSS SAID GAP, SAID VOLTAGE BEING BELOW THE BREAKDOWN VALVE REGUIRED TO BRIDGE SAID GAP AT SUBSTANTIALLY ONE ATMOSPHERE; AND REDUCING THE FLUID PRESSURE IN THE REGION OF SAID GAP UNTIL AN ARC IS STRUCK ACROSS SAID GAP.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |