US2880855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing steel
Assignee: Lasalle Steel Co
•
Filing: 1955-11-29
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Granted: 1959-04-07
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Expires: 1975-11-29
Abstract
No abstract record available.
Inventors
- 👤 Elliot S Nachtman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
C; C21; C21D; C21D7/00; B; B21; B21B; B21B45/00; B21C; B21C37/00; B21C37/04; B21C43/00; C23; C23G; C23G1/00; C23G1/28; C23G1/32; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A METHOD FOR HEATING, DESCALING AND LUBRICATING STEEL IN CONJUNCTION WITH A WORKING OPERATION TO EFFECT REDUCTION IN CROSS-SECTIONAL AREA AT TEMPERATURES OF 250* F. TO THE LOWER CRITICAL TEMPERATURE FOR THE STEEL COMPRISING REACTING THE SURFACE OF THE STEEL WITH A MOLTEN ALKALI METAL HYDROXIDE CONTAINING A REDUCING AGENT CONCURRENTLY AND IN A SINGLE STEP TO DESCALE THE STEEL TO LUBRICATE THE STEEL AND TO HEAT THE STEEL TO THE ELEVATED TEMPERATURE FOR THE ELEVATED TEMPERATURE REDUCTION STEP AND THEN WORKING THE STEEL AS A CONTINOUS OPERATION FOLLOWING TREATMENT WITH THE MOLTEN ALKALI METAL HYDROXIDE AND WITH THE MOLTEN ALKALI METAL HYDROXIDE PRESENT AS A LUBRICANT ON THE SURFACE THEREOF AND WHILE THE STEEL IS AT AN ELEVATED TEMPERATURE RESPONSIVE TO HEATING BY THE MOLTEN ALKALI METAL HYDROXIDE TO EFFECT A REDUCTION IN CROSSSECTIONAL AREA WHILE THE STEEL IS AT A TEMPERATURE WITHIN THE RANGE OF 250*F. TO THE LOWER CRITICAL TEMPERATURE FOR THE STEEL.
Claim 2
Independent Claim
156 words
A METHOD FOR HEATING, DESCALING AND LUBRICATING STEEL IN CONJUNCTION WITH A WORKING OPERATION TO EFFECT REDUCTION IN CROSS-SECTIONAL AREA AT TEMPERATURES OF 250* F. TO THE LOWER CRITICAL TEMPERATURE FOR THE STEEL COMPRISING REACTING THE SURFACE OF THE STEEL WITH A MOLTEN ALKALI METAL HYDROXIDE CONTAINING A REDUCING AGENT CONCURRENTLY AND IN A SINGLE STEP TO DESCALE THE STEEL TO LUBRICATE THE STEEL AND TO HEAT THE STEEL TO THE ELEVATED TEMPERATURE FOR THE ELEVATED TEMPERATURE REDUCTION STEP AND THEN WORKING THE STEEL AS A CONTINOUS OPERATION FOLLOWING TREATMENT WITH THE MOLTEN ALKALI METAL HYDROXIDE AND WITH THE MOLTEN ALKALI METAL HYDROXIDE PRESENT AS A LUBRICANT ON THE SURFACE THEREOF AND WHILE THE STEEL IS AT AN ELEVATED TEMPERATURE RESPONSIVE TO HEATING BY THE MOLTEN ALKALI METAL HYDROXIDE TO EFFECT A REDUCTION IN CROSSSECTIONAL AREA WHILE THE STEEL IS AT A TEMPERATURE WITHIN THE RANGE OF 250*F. TO THE LOWER CRITICAL TEMPERATURE FOR THE STEEL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |