US2678889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for glazing aluminous bodies
Assignee: Individual
•
Filing: 1951-04-16
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Granted: 1954-05-18
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Expires: 1971-04-16
Abstract
No abstract record available.
Inventors
- 👤 Eidenberg Josef
- 👤 Kuhn Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:03
CPC Classifications
C; C03; C03C; C03C4/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
160 words
A PROCESS FOR APPLYING A TOUGH, THIN, AND WELL ADHERING GLAZE TO CERAMIC BODIES CONTAINING AT LEAST 80% BY WEIGHT OF ALUMINA COMPRISING THE STEPS OF COATING THE SURFACE OF THE CERAMIC BODYWITH A LAYER COMPRISING A MIXTURE OF ABOUT 15% QUARTZ AND THE REMAINDER SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND A MIXTURE OF BORIC ACID AND RED LEAD, FIRING THE COATED BODY AT A TEMPERATURE IN THE ORDER OF 1100* F. TO REACT ONLY A PORTION OF SAID MATERIAL WITH THE ALUMINA AT THE SURFACE OF SAID BODY TO FORM A THIN ACID AND LYE INSOLUBLE GLAZE ON SAID BODY, AND THEREAFTER REMOVING THE UNREACTED MATERIAL FROM SAID BODY BY DISSOLVING THE SAME WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF ACIDS AND LYES, SAID SOLVENT BEING CAPABLE OF DISSOLVING ONLY THE UNREACTED MATERIAL AND BEING INCAPABLE OF DISSOLVING THE INSOLUBLE GLAZE ON SAID BODY WHEREIN THE DIMENSIONS OF SAID CERAMIC BODIES ARE SUBSTANTIALLY UNCHANGED.
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) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |