US3736181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating cro2 with alumina
Assignee: EIDP Inc
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Filing: 1972-06-09
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Granted: 1973-05-29
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Expires: 1992-06-09
Abstract
Abstract THE ALUMINA COATING IS PRODUCED BY SLURRYING CRO2 PARTICLES IN WATER, IN A SOLUTION OF AN ALUMINM-CONTAINING SALT, IN AN ACID, OR IN A BASE, AND ADDING WITH AGITATION IN ANY ORDER, SEQUENTIALLY OR SIMULTANEOUSLY, A SOLUTION OF AT LEAST ONE OF AN ALUMINUM-CONTAINING SALT, AN ACID OR A BASE IN SUFFICIENT QUANTITY TO ESTBLISH AND MAINTAIN, THE PH OF THE SLURRY IN THE RANGE OF 4 TO 10.
Inventors
- 👤 D Pye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:15
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/0302; H01F1/0311; H01F1/0313; G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70636; G11B5/712; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
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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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |