US3311488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for forming a refractory coating on aluminum
Assignee: EIDP Inc
•
Filing: 1963-07-09
•
Granted: 1967-03-28
•
Expires: 1983-07-09
Abstract
No abstract record available.
Inventors
- 👤 Seufert Ludwig Edward
- 👤 Talsma Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:32
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/66; C23; C23C; C23C24/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS COMPRISING HEATING AT A TEMPERATURE OF ABOVE 800*C. A LAYER OF MOLTEN ALUMINUM WHICH CONTACTS THEREON A LAYER OF PARTICULATE REFRACTORY, SAID REFRACTORY INCLUDING AT LEAST 1% BY WEIGHT OF A FLUXING AGENT SELECTED FROM THE GROUP CONSISTING OF THE OXIDES AND HYDROXIDES OF ALKALI METAL, MAGNESIUM OXIDE, ZINC OXIDE, COBALTII OXIDE, COPPERII OXIDE, AND LEADII OXIDE AND PRECURSORS THEREOF, TO FORM A DENSE COHERENT SUBSTANTIALLY CRYSTALLINE MATERIAL.
Claim 2
Dependent Claim
70 words
A PROCESS COMPRISING HEATING AT A TEMPERATURE OF ABOVE 800*C. A LAYER OF MOLTEN ALUMINUM WHICH CONTACTS THEREON A LAYER OF PARTICULATE REFRACTORY, SAID REFRACTORY INCLUDING AT LEAST 1% BY WEIGHT OF A FLUXING AGENT SELECTED FROM THE GROUP CONSISTING OF THE OXIDES AND HYDROXIDES OF ALKALI METAL, MAGNESIUM OXIDE, ZINC OXIDE, COBALTII OXIDE, COPPERII OXIDE, AND LEADII OXIDE AND PRECURSORS THEREOF, TO FORM A DENSE COHERENT SUBSTANTIALLY CRYSTALLINE MATERIAL.
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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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |