US3297899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc torches having a variably constricting element in the arc passageway
Assignee: Victor Equipment Co
•
Filing: 1964-01-24
•
Granted: 1967-01-10
•
Expires: 1984-01-24
Abstract
No abstract record available.
Inventors
- 👤 Chapin A Pratt
- 👤 John W Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:08
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/3468; H05H1/3484
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
AN ELECTRIC ARC TORCH COMPRISING A FIRST ELECTRODE, A SECOND ELECTRODE IN THE FORM OF A NOZZLE DEFINING AN ELONGATED ARC PASSAGEWAY, MEANS FOR ESTABLISHING AN ARC BETWEEN SAID ELECTRODES, GAS MEANS FOR STABILIZING SAID ARC IN SAID PASSAGEWAY, AND A VARIABLY CONSTRICTING ELEMENT IN
Claim 2
Dependent Claim
45 words
AN ELECTRIC ARC TORCH COMPRISING A FIRST ELECTRODE, A SECOND ELECTRODE IN THE FORM OF A NOZZLE DEFINING AN ELONGATED ARC PASSAGEWAY, MEANS FOR ESTABLISHING AN ARC BETWEEN SAID ELECTRODES, GAS MEANS FOR STABILIZING SAID ARC IN SAID PASSAGEWAY, AND A VARIABLY CONSTRICTING ELEMENT IN
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |