Patent US2711979A successfully refreshed from Google Patents.
US2711979A
Expired / Lapsed
US
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Process of cutting stainless steel and the like
Assignee: National Cylinder Gas Co
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Filing: 1952-06-17
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Granted: 1955-06-28
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Expires: 1972-06-17
Abstract
No abstract record available.
Inventors
- 👤 Pota John B La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:22
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/08; B23K35/00; B23K35/22; B23K35/228
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN THE METHOD OF CUTTING METALS NORMALLY IMMUNE OR RESISTANT TO CONVENTIONAL FLAME CUTTING WITH PREHEAT AND OXYGEN ALONE, SUCH AS STAINLESS STEELS AND THE LIKE, BY THE ACTION OF A FLUX-FORMING MATERIAL APPLIED CONCURENTLY WITH A STREAM OF OXYGEN TO THE PREHEATED METAL, THE IMPROVEMENT COMPRISING THE STEPS OF DELIVERING THE FLUXFORMING MATERIAL TO THE SITE OF THE CUT IN A STREAM OF A CARRIER GAS COMPRISING A MIXTURE OF A GAS WHICH IS NOOXIDIZING UNDER SAID SPECIFIC FLAME CUTTING CONDITIONS, WITH AT LEAST 5% BY VOLUME OF HYDROGEN AND NOT MORE THAN WILL RENDER THE MIXTURE INFLAMMABLE IN AIR, THEREBY IMPROVING THE METAL SURFACE BY REDUCING OR PREVENTING THE FORMATION OF TIGHTLY ADHERING SCALE.
Claim 2
Dependent Claim
116 words
IN THE METHOD OF CUTTING METALS NORMALLY IMMUNE OR RESISTANT TO CONVENTIONAL FLAME CUTTING WITH PREHEAT AND OXYGEN ALONE, SUCH AS STAINLESS STEELS AND THE LIKE, BY THE ACTION OF A FLUX-FORMING MATERIAL APPLIED CONCURENTLY WITH A STREAM OF OXYGEN TO THE PREHEATED METAL, THE IMPROVEMENT COMPRISING THE STEPS OF DELIVERING THE FLUXFORMING MATERIAL TO THE SITE OF THE CUT IN A STREAM OF A CARRIER GAS COMPRISING A MIXTURE OF A GAS WHICH IS NOOXIDIZING UNDER SAID SPECIFIC FLAME CUTTING CONDITIONS, WITH AT LEAST 5% BY VOLUME OF HYDROGEN AND NOT MORE THAN WILL RENDER THE MIXTURE INFLAMMABLE IN AIR, THEREBY IMPROVING THE METAL SURFACE BY REDUCING OR PREVENTING THE FORMATION OF TIGHTLY ADHERING SCALE.
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) | 1958-06-27 | 1958-12-27 | 1959-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-27 | 1962-12-27 | 1963-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-27 | 1966-12-27 | 1967-06-28 | $7700.00 | Window Closed / Lapsed |