US3223822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc torches
Assignee: Victor Equipment Co
•
Filing: 1963-08-06
•
Granted: 1965-12-14
•
Expires: 1983-08-06
Abstract
No abstract record available.
Inventors
- 👤 James A Browning
- 👤 Chapin A Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:22
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/3405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
THE METHOD OF STABILIZING AN ARC COLUMN IN AN ELECTRIC ARC TORCH WITH A PLASMA FORMING GAS COMPRISING; INTRODUCING SAID GAS AT SUCCESSIVE POINTS ALONG SAID COLUMN; AND, AT ALTERNATE POINTS ALONG SAID COLUMN, DRAWING OFF A
Claim 2
Independent Claim
37 words
THE METHOD OF STABILIZING AN ARC COLUMN IN AN ELECTRIC ARC TORCH WITH A PLASMA FORMING GAS COMPRISING; INTRODUCING SAID GAS AT SUCCESSIVE POINTS ALONG SAID COLUMN; AND, AT ALTERNATE POINTS ALONG SAID COLUMN, DRAWING OFF A
References Cited (Backward Citations)
US3148263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |