US3157538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grain oriented silicon steel containing selenium and method of making the same
Assignee: JFE Steel Corp
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Filing: 1960-12-12
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Granted: 1964-11-17
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Expires: 1980-12-12
Abstract
No abstract record available.
Inventors
- 👤 Imai Mitsuo
- 👤 Nakayama Tatsuo
- 👤 Goto Isamu
- 👤 Shimanaka Hiroshi
- 👤 Tsuruoka Kazuo
- 👤 Matoba Isao
- 👤 Ono Yutaka
- 👤 Kamada Akio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:26
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14775; C; C22; C22C; C22C38/00; C22C38/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE PROCESS OF PRODUCING GRAIN ORIENTED SILICON STEEL COMPRISING THE STEPS OF ADDING 0.001 TO 0.100 PERCENT BY WEIGHT OF SELENIUM INTO MOLTEN SILICON STELL SO AS TO FORM A SILOCON STEEL COMPOSITION CONSISTING ESSENTIALLY OF 2 TO 4 PERCENT BY WEIGHT OF SILICON, 0.001 TO 0.100 PERCENT BY WEIGHT SELENIUM, THE BALANCE BEING IRON, FOR CASING AN INGOT, AND HOT WORKING SAID INGOT TO A HOT ROLLED STRIP,AND SUBJECTING SAID STRIP TO AT LEAST ONE COLD ROLLING TREATMENT AND FINAL HIGH TEMPERATURE ANNEAL.
Claim 2
Dependent Claim
84 words
THE PROCESS OF PRODUCING GRAIN ORIENTED SILICON STEEL COMPRISING THE STEPS OF ADDING 0.001 TO 0.100 PERCENT BY WEIGHT OF SELENIUM INTO MOLTEN SILICON STELL SO AS TO FORM A SILOCON STEEL COMPOSITION CONSISTING ESSENTIALLY OF 2 TO 4 PERCENT BY WEIGHT OF SILICON, 0.001 TO 0.100 PERCENT BY WEIGHT SELENIUM, THE BALANCE BEING IRON, FOR CASING AN INGOT, AND HOT WORKING SAID INGOT TO A HOT ROLLED STRIP,AND SUBJECTING SAID STRIP TO AT LEAST ONE COLD ROLLING TREATMENT AND FINAL HIGH TEMPERATURE 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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |