US3303064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy steel article and method of producing
Assignee: Inland Steel Co
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Filing: 1963-11-29
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Granted: 1967-02-07
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Leslie M Bernick
- 👤 Melvin B Gibbs
- 👤 Carlton F Schrader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:17
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/0247; C21D8/0273; C21D1/00; C21D1/74; C21D1/76; C21D8/0221; C21D8/0236; C21D8/0278; C21D8/0284
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN A METHOD OF FORMING A COLD REDUCED ALLOY STEEL SHEET MATERAL WHICH IS FREE OF OBJECTIONABLE LONGITUDINALLY EXTENDING SURFACE MARKINGS NORMALLY APPEARING IN THE SURFACE THEREOF AFTER COLD REDUCTION AND CONVENTIONAL HEAT TREATMENT, THE IMPROVEMENT WHICH COMPRISES; HEATING A COLD REDUCED LOW-CARBON TITANIUM CONTAINING STEEL SHEET MATERIAL HAVING OBJECTIONALBY LONGITUDINALLY EXTENDING SURFACE MARKINGS IN A REDUCING NON OXIDIZING ATMOSPHERE TO A TEMPERATURE OF AT LEAST ABOUT 1620*F. WITHOUT PREVIOUS EXPOSURE OF THE SAID COLD REDUCED STEEL SHEET MATERIAL TO SURFACE OXIDATION DURING SAID HEAT TREATMENT, THE AMOUNT OF TITANIUM IN SAID STEEL BEING AT LEAST SUFFICIENT TO COMBINE WITH ALL THE CARBON IN THE STEEL.
Claim 2
Dependent Claim
106 words
IN A METHOD OF FORMING A COLD REDUCED ALLOY STEEL SHEET MATERAL WHICH IS FREE OF OBJECTIONABLE LONGITUDINALLY EXTENDING SURFACE MARKINGS NORMALLY APPEARING IN THE SURFACE THEREOF AFTER COLD REDUCTION AND CONVENTIONAL HEAT TREATMENT, THE IMPROVEMENT WHICH COMPRISES; HEATING A COLD REDUCED LOW-CARBON TITANIUM CONTAINING STEEL SHEET MATERIAL HAVING OBJECTIONALBY LONGITUDINALLY EXTENDING SURFACE MARKINGS IN A REDUCING NON OXIDIZING ATMOSPHERE TO A TEMPERATURE OF AT LEAST ABOUT 1620*F. WITHOUT PREVIOUS EXPOSURE OF THE SAID COLD REDUCED STEEL SHEET MATERIAL TO SURFACE OXIDATION DURING SAID HEAT TREATMENT, THE AMOUNT OF TITANIUM IN SAID STEEL BEING AT LEAST SUFFICIENT TO COMBINE WITH ALL THE CARBON IN THE STEEL.
References Cited (Backward Citations)
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US2495836A
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US2755210A
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US2602034A
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US3055779A
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US3193417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |