Patent US3522113A successfully refreshed from Google Patents.
US3522113A
Expired / Lapsed
US
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Potassium silicate coated silicon steel article
Assignee: Armco Inc
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Filing: 1968-01-02
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Granted: 1970-07-28
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Expires: 1988-01-02
Abstract
No abstract record available.
Inventors
- 👤 Dale M Kohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:42
CPC Classifications
C; C23; C23C; C23C24/00; C21; C21D; C21D1/00; C21D1/68; C21D1/70; C23D; C23D5/00; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14775; H01F1/14783; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2384542A
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US2492095A
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US2554250A
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US2920296A
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US2980561A
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US3214302A
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US3138492A
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US3418710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |