US2821615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting of metals and alloys
Assignee: BOC Group Ltd
•
Filing: 1955-04-22
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Granted: 1958-01-28
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Expires: 1975-04-22
Abstract
No abstract record available.
Inventors
- 👤 Fannon Robert Leydon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:57
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
PROCESS FOR CUTTING METALS AND ALLOYS WHICH CONPRISES FEEDING A CONSUMABLE ELECTRODE IN THE FORM OF A FERROUS WIRE TO A HIGH DENSITY ELECTRIC ARE STUCK BETWEEN THE WIRE AND THE WORKPIECE TO BE CUT, FEEDING NITROGEN IN ADMIXTURE WITH AN AMOUNT OF OXYGEN NOT SUBSTANTIALLY GREATER THAN 10% BY VOLUME OF THE TOTAL GAS MIXTURE TO SURROUND THE ARC, AND MOVING THE ELECTRODE RELATIVE TO THE WORKPIECE ALONG THE LINE OF CUT, SO AS TO MAINTAIN THE ARC AND CUT THROUGH THE WORKPIECE.
Claim 2
Dependent Claim
84 words
PROCESS FOR CUTTING METALS AND ALLOYS WHICH CONPRISES FEEDING A CONSUMABLE ELECTRODE IN THE FORM OF A FERROUS WIRE TO A HIGH DENSITY ELECTRIC ARE STUCK BETWEEN THE WIRE AND THE WORKPIECE TO BE CUT, FEEDING NITROGEN IN ADMIXTURE WITH AN AMOUNT OF OXYGEN NOT SUBSTANTIALLY GREATER THAN 10% BY VOLUME OF THE TOTAL GAS MIXTURE TO SURROUND THE ARC, AND MOVING THE ELECTRODE RELATIVE TO THE WORKPIECE ALONG THE LINE OF CUT, SO AS TO MAINTAIN THE ARC AND CUT THROUGH THE WORKPIECE.
References Cited (Backward Citations)
US1589017A
Cited
US2053417A
Cited
US2479412A
Cited
US2504868A
Cited
FR1051528A
Cited
GB709533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |