US2666722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal treatment
Assignee: Bethlehem Steel Corp
•
Filing: 1948-05-04
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Granted: 1954-01-19
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Expires: 1968-05-04
Abstract
No abstract record available.
Inventors
- 👤 Epstein Samuel
- 👤 Herbert J Cutler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:10
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/04; C21D8/0421; C21D8/0426
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
IN A METHOD OF PRODUCING SHEET, THE STEPS OF HOT ROLLING A BLANK OF RIMMED STEEL CONTAINING VANADIUM BETWEEN ABOUT .01% AND ABOUT .15% INTO STRIP AND SLOW COOLING THE STRIP FROM NEAR THE HOT FINISHING TEMPERATURE AND WHILE IT IS AT LEAST 1400* F.
Claim 2
Dependent Claim
45 words
IN A METHOD OF PRODUCING SHEET, THE STEPS OF HOT ROLLING A BLANK OF RIMMED STEEL CONTAINING VANADIUM BETWEEN ABOUT .01% AND ABOUT .15% INTO STRIP AND SLOW COOLING THE STRIP FROM NEAR THE HOT FINISHING TEMPERATURE AND WHILE IT IS AT LEAST 1400* F.
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) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |