Patent US2624706A successfully refreshed from Google Patents.
Patent US3523837A successfully refreshed from Google Patents.
US3523837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-reactive refractory separating coatings for electrical steels
Assignee: Westinghouse Electric Corp
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Filing: 1967-11-06
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Granted: 1970-08-11
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Expires: 1987-11-06
Abstract
No abstract record available.
Inventors
- 👤 Norman M Pavlik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:34
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/68; C21D1/70; 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |