Patent US3705826A successfully refreshed from Google Patents.
US3705826A
Expired / Lapsed
US
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Insulating coating and method of making the same
Assignee: General Electric Co
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Filing: 1970-09-23
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Granted: 1972-12-12
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Expires: 1990-09-23
Abstract
Abstract ELECTRICALLY INSULATING COATING FOR STRAND ANNEALED MAGNETIC SILICON STEEL IS COMPOSED OF AN AQUEOUS MIXTURE OF CHROMIUM HYDROXIDE, PHOSPHORIC ACID, AND COLLOIDAL SILICA.
Inventors
- 👤 Robert G Hirst
- 👤 George J Desnoyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:49
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/73; C23C22/74; H; H01; H01B; H01B3/00; H01B3/02; H01B3/10; 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)
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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |