US3676227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing single oriented silicon steel plates low in the iron loss
Assignee: Nippon Steel Corp
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Filing: 1969-10-31
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Granted: 1972-07-11
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Expires: 1989-10-31
Abstract
Abstract A PROCESS FOR PRODUCING A SINGLE ORIENTED SILICON STEEL PLATE OR PARTICULARLY A SINGLE ORIENTED SILICON STEEL PLATE HAVING A HIGH MAGNETIC INDUCTION PRODUCED BY ADDING A SMALL AMOUNT OF AL IN THE MOLTEN STEEL CHARACTERIZED BY THAT IN HEATING STEEL PLATE IT IS PAINTED WITH AN ANNEALING SEPARATING AGENT, TO WHICH BORON OR BORON COMPOUND IS ADDED IN A PRESCRIBED AMOUNT, AND THEN FINALLY ANNEALED, WHEREBY THE IRON LOSS CAN BE REMARKABLY REDUCED.
Inventors
- 👤 Fumio Matsumoto
- 👤 Toshiya Wada
- 👤 Takaaki Yamamoto
- 👤 Osamu Tanaka
- 👤 Kunihide Takashima
- 👤 Toshihiko Takata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:37
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/68; C21D1/70; C21D8/00; C21D8/12; C21D8/1277; C21D8/1283; C22; C22C; C22C38/00; C22C38/02; C21D8/1216; C21D8/1233; C21D8/1244; C21D8/1261; C21D8/1266
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |