US2918384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ceramic frit compositions
Assignee: NL Industries Inc
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Filing: 1959-01-12
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Granted: 1959-12-22
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Expires: 1979-01-12
Abstract
No abstract record available.
Inventors
- 👤 Malcolm D Beals
- 👤 Edward A Giess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:53
CPC Classifications
C; C03; C03C; C03C4/00; C03C2204/00; C03C2204/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A FRIT COMPOSITION ADAPTABLE FOR PREPARATION OF SELFOPACIFIED CERAMIC GLAZES CONSISTING ESSENTIALLY OF SIO2 IN AMOUNT FROM ABOUT 50 TO ABOUT 68 MOLE PERCENT, AL2O3 IN AMOUNT FROM ABOUT 4 TO 12 MOLE PERCENT, TIO2 IN AMOUNT FROM ABOUT 6 TO ABOUT 18 MOLE PERCENT, ZRO2 IN AMOUNT FROM 0 TO 6 MOLE PERCENT, ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF NA2O AND K2O, SAID ALKALI METAL OXIDE IN AMOUNT FROM ABOUT 4 TO ABOUT 18 MOLE PERCENT IN WHICH THE NA2O IS PRESENT IN AMOUNT OF AT LEAST ABOUT 3 MOLE PERCENT, ALKALINE EARTH METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF CAO, MGO AND SRO, SAID ALKALINE EARTH METAL OXIDE IN AMOUNT FROM ABOUT 5 TO ABOUT 15 MOLE PERCENT.
Claim 2
Dependent Claim
124 words
A FRIT COMPOSITION ADAPTABLE FOR PREPARATION OF SELFOPACIFIED CERAMIC GLAZES CONSISTING ESSENTIALLY OF SIO2 IN AMOUNT FROM ABOUT 50 TO ABOUT 68 MOLE PERCENT, AL2O3 IN AMOUNT FROM ABOUT 4 TO 12 MOLE PERCENT, TIO2 IN AMOUNT FROM ABOUT 6 TO ABOUT 18 MOLE PERCENT, ZRO2 IN AMOUNT FROM 0 TO 6 MOLE PERCENT, ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF NA2O AND K2O, SAID ALKALI METAL OXIDE IN AMOUNT FROM ABOUT 4 TO ABOUT 18 MOLE PERCENT IN WHICH THE NA2O IS PRESENT IN AMOUNT OF AT LEAST ABOUT 3 MOLE PERCENT, ALKALINE EARTH METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF CAO, MGO AND SRO, SAID ALKALINE EARTH METAL OXIDE IN AMOUNT FROM ABOUT 5 TO ABOUT 15 MOLE PERCENT.
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) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |