US3582407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium oxide coating composition and process for producing annealed steel punching stock
Assignee: Morton International LLC
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Filing: 1969-08-18
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Granted: 1971-06-01
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Expires: 1989-08-18
Abstract
Abstract MAGNESIUM OXIDE COATING COMPOSITIONS COMPRISING A MAJOR PROPORTION OF MAGNESIUM OXIDE OF A SURFACE AREA OF FROM 5 TO 50 SQUARE METERS PER GRAM AND A MINOR PROPORTION OF AN ALKALINE EARTH METAL FLUORIDE. THE COMPOSITIONS ARE USED FOR COATINGS IN A PROCESS FOR PRODUCING ANNEALED MAGNETIC STEEL SHEET WHEREIN THE COATINGS ARE APPLIED TO SILICON-MAGNETIC STEEL SHEET, DRIED, AND THE COATED STEEL ANNEALED. THE COATINGS SUBSTANTIALLY PREVENT THE FORMATION OF HARD SURFACE AND SUB-SURFACE SILICATES AND ALSO PREVENT THE FUSING TOGETHER OF THE STEEL SHEET DURING THE ANNEALING PROCESS.
Inventors
- 👤 John F Steger
- 👤 Jay W Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:25
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/68; C21D1/70; C09; C09D; C09D1/00; C23; C23D; C23D5/00; C23D5/10; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14775; H01F1/14783
Claims Analysis
Total Claims: 0
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |