US3030240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of electrolytic tin plate
Assignee: United States Steel Corp
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Filing: 1959-08-11
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Granted: 1962-04-17
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Expires: 1979-08-11
Abstract
No abstract record available.
Inventors
- 👤 John N Crombie
- 👤 Robert M Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:37
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C25; C25D; C25D5/00; C25D5/34; C25D5/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN THE MANUFACTURE OF ELECTROLYTIC TIN PLATE WHEREIN A STEEL BASES METAL SUITABLE FOR SUCH PLATE IS ANNEALED BY HEATING TO A TEMPERATURE OF BETWEEN 1000* AND 1400*F., HOLDING AT A TEMPERATURE WITHIN SAID RANGE AND THEN COOLING TO AT LEAST 300*F. BEFORE EXPOSURE TO AIR PRIOR TO THE COATING THEREOF WITH TIN, THE IMPROVEMENT COMPRISING CONDUCTING SAID ANNEALING IN AN ATMOSPHERE OF N2 CONTAINING BY VOLUME BETWEEN 2 AND 16% H2, NOT MORE THAN 1.0% CO, NOT MORE THAN 0.1% CO2 AND WATAER VAPOR, AND REGULATING THE WATER VAPOR CONTENT OF SAID ATMOSPHERE TO MAINTAIN: (1) A VOLUME RATIO OF H2O TO H2 OF NOT MORE THAN 0.2 IN THE ATMOSPHERE CONTACTING SAID STEEL DURING THE INTERVAL OF SAID ANNEALING REQUIRED TO BRING THE STEEL TO 100*F.,
Claim 2
Dependent Claim
128 words
IN THE MANUFACTURE OF ELECTROLYTIC TIN PLATE WHEREIN A STEEL BASES METAL SUITABLE FOR SUCH PLATE IS ANNEALED BY HEATING TO A TEMPERATURE OF BETWEEN 1000* AND 1400*F., HOLDING AT A TEMPERATURE WITHIN SAID RANGE AND THEN COOLING TO AT LEAST 300*F. BEFORE EXPOSURE TO AIR PRIOR TO THE COATING THEREOF WITH TIN, THE IMPROVEMENT COMPRISING CONDUCTING SAID ANNEALING IN AN ATMOSPHERE OF N2 CONTAINING BY VOLUME BETWEEN 2 AND 16% H2, NOT MORE THAN 1.0% CO, NOT MORE THAN 0.1% CO2 AND WATAER VAPOR, AND REGULATING THE WATER VAPOR CONTENT OF SAID ATMOSPHERE TO MAINTAIN: (1) A VOLUME RATIO OF H2O TO H2 OF NOT MORE THAN 0.2 IN THE ATMOSPHERE CONTACTING SAID STEEL DURING THE INTERVAL OF SAID ANNEALING REQUIRED TO BRING THE STEEL TO 100*F.,
References Cited (Backward Citations)
US2587605A
Cited
US2594129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |