US3215567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep drawing non-aging cold rolled steel sheet and a method of producing the same
Assignee: JFE Steel Corp
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Filing: 1962-04-30
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Granted: 1965-11-02
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Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Yoshida Hiroshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:15
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/04; C21D8/0447; C21D8/0457; B; B21; B21D; B21D22/00; B21D22/20; B21D22/201; C21D3/00; C21D3/02; C21D8/0421; C21D8/0426; C21D9/00; C21D9/46; C21D9/48; C22; C22C; C22C38/00; C22C38/002; C21D8/0473; Y; Y10; Y10S; Y10S148/00; Y10S148/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A DEEP DRAWABLE NON-AGING COLD ROLLED STEEL SHEET CHARACTERIZED BY HAVING A GOOD DRAWABILITY REPRESENTED BY A CONICAL CUP VALUE DETERMINED BY THE CONICAL CUP TEST, SAID VALUE BEING LESS THAN ABOUT 36.70 FOR A SHEET OF THE THICKNESS OF 0.8 MM., SAID STEEL CONSISTING ESSENTIALLY OF LESS THAN .020% CARBON, 0.030-0.120% PHOSPHORUS, LESS THAN 0.0025% NITROGEN AND THE REMAINDER IRON AND INCIDENTAL IMPURITIES, SAID STEEL SHEET BEING PRODUCED BY SUBJECTING A COLD ROLLED STEEL SHEET CONTAINING 0.0300.120% PHOSPHORUS TO A DECARBURIZING AND DENITRIDING ANNEAL.
Claim 2
Dependent Claim
85 words
A DEEP DRAWABLE NON-AGING COLD ROLLED STEEL SHEET CHARACTERIZED BY HAVING A GOOD DRAWABILITY REPRESENTED BY A CONICAL CUP VALUE DETERMINED BY THE CONICAL CUP TEST, SAID VALUE BEING LESS THAN ABOUT 36.70 FOR A SHEET OF THE THICKNESS OF 0.8 MM., SAID STEEL CONSISTING ESSENTIALLY OF LESS THAN .020% CARBON, 0.030-0.120% PHOSPHORUS, LESS THAN 0.0025% NITROGEN AND THE REMAINDER IRON AND INCIDENTAL IMPURITIES, SAID STEEL SHEET BEING PRODUCED BY SUBJECTING A COLD ROLLED STEEL SHEET CONTAINING 0.0300.120% PHOSPHORUS TO A DECARBURIZING AND DENITRIDING ANNEAL.
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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |