US3455747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermochemical scarfing method and apparatus
Assignee: L-Tec Co
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Filing: 1966-09-14
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Granted: 1969-07-15
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Expires: 1986-09-14
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Lytle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:08
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A METHOD FOR THERMOCHEMICALLY SCARFING THE SURFACE OF A METAL BODY WHICH COMPRISES: (A) FORMING A MOLTEN SLAG-IRON PUDDLE ACROSS THE WIDTH OF THE SURFACE OF THE METAL BODY; (B) MAINTAINING SAID PUDDLE IN A MOLTEN STATE BY DIRECTING A SHEET-LIKE STREAM OF OXYGEN AGAINST THE PUDDLE AT AN ACUTE ANGLE THERETO, THEREBY PRODUCING AN EXOTHERMIC CHEMICAL REACTION; (C) SELECTIVELY SCARFING OUT DEFECTS IN THE SURFACE OF THE METAL BODY BY DIRECTING AT LEAST ONE INDIVIDUAL STREAM OF SCARFING OXYGEN AGAINST THE REARWARD PORTION OF SAID PUDDLE AT POINTS IN SUBSTANTIAL ALIGNMENT WITH SAID DEFECTS, AND (D) PRODUCING RELATIVE MOVEMENT BETWEEN THE BODY AND SAID STREAM OF OXYGEN FOR CONTINUING THE SCARFING REACTION ALONG THE LENGTH OF THE METAL BODY.
Claim 2
Independent Claim
120 words
A METHOD FOR THERMOCHEMICALLY SCARFING THE SURFACE OF A METAL BODY WHICH COMPRISES: (A) FORMING A MOLTEN SLAG-IRON PUDDLE ACROSS THE WIDTH OF THE SURFACE OF THE METAL BODY; (B) MAINTAINING SAID PUDDLE IN A MOLTEN STATE BY DIRECTING A SHEET-LIKE STREAM OF OXYGEN AGAINST THE PUDDLE AT AN ACUTE ANGLE THERETO, THEREBY PRODUCING AN EXOTHERMIC CHEMICAL REACTION; (C) SELECTIVELY SCARFING OUT DEFECTS IN THE SURFACE OF THE METAL BODY BY DIRECTING AT LEAST ONE INDIVIDUAL STREAM OF SCARFING OXYGEN AGAINST THE REARWARD PORTION OF SAID PUDDLE AT POINTS IN SUBSTANTIAL ALIGNMENT WITH SAID DEFECTS, AND (D) PRODUCING RELATIVE MOVEMENT BETWEEN THE BODY AND SAID STREAM OF OXYGEN FOR CONTINUING THE SCARFING REACTION ALONG THE LENGTH OF THE METAL BODY.
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) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |