US3583887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium oxide coating composition and process
Assignee: Morton International LLC
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Filing: 1969-08-18
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Granted: 1971-06-08
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Expires: 1989-08-18
Abstract
Abstract MAGNESIUM OXIDE COATING COMPOSITIONS AND PROCESS FOR APPLYING TO SILICON-CONTAINING MAGNETIC STEEL AN ADHERENT COATING WHICH ACTS AS A SEPARATING MEDIUM TO PREVENT FUSING OR WELDING OF COILED SHEET DURING AN ANNEALING PROCESS AND WHICH COATING PROVIDES ELECTRICAL INSULATIING AND CORROSION RESISTANT PROPERTIES. THE COATING COMPOSITIONS COMPRISE A MAJOR PROPORTION OF MAGNESIUM OXIDE AND A MINOR PROPORTION OF ADDITIVES CONTAINING A BORON COMPOUND, A SODIUM COMPOUND, AND SILICA OR A SILICON-CONTAINING COMPOUND.
Inventors
- 👤 John F Steger
- 👤 Jay W Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:48
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/68; C21D1/70; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |