Patent US2606848A successfully refreshed from Google Patents.
US2606848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making sheet steel
Assignee: Republic Steel Corp
•
Filing: 1949-10-19
•
Granted: 1952-08-12
•
Expires: 1969-10-19
Abstract
No abstract record available.
Inventors
- 👤 Harold L Farling
- 👤 Edward C Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:35
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/04; C21D8/0421; C21D8/0426; C21D8/0431; C21D8/0436; C21D8/0447; C21D8/0468; C21D8/0473
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
THE METHOD OF MAKING STEEL IN SHEET OR STRIP FORM WHICH COMPRISES THE STEPS OF CONTINUOUSLY ROLLING SIMPLE LOW CARBON STEEL WHILE SUCH STEEL IS IN THE TEMPERATURE RANGE OF FROM ABOUT 1600* F. TO ABOUT 1000* F., REDUCING ITS THICKNESS ABOUT 40% IN A MEDIUM HEAVY REDUCTION FINISHING PASS, THEN ABOUT 35% IN A LIGHT REDUCTION FINISHING PASS, AND THEN ABOUT 40% IN A MEDIUM HEAVY REDUCTION FINISHING PASS, THEN ABOUT 4% AND ABOUT 6% RESPECTIVELY IN THE NEXT TWO SUCCEEDING FINISHING PASSES, COLD ROLLING THE THUS HOT ROLLED STEEL, AND ANNEALING THE THUS COLD ROLLED STEEL AT A TEMPERATURE BETWEEN ABOUT 1175* F. AND ABOUT 1380* F.
References Cited (Backward Citations)
US1785786A
Cited
US1946240A
Cited
GB423868A
Cited
US2087765A
Cited
US2087766A
Cited
US2125153A
Cited
US2381435A
Cited
US2377922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |