US2998320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic compositions
Assignee: NL Industries Inc
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Filing: 1959-11-12
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Granted: 1961-08-29
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Expires: 1979-11-12
Abstract
No abstract record available.
Inventors
- 👤 James H Strimple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:24
CPC Classifications
C; C03; C03C; C03C4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A CERAMIC GLAZE CONSISTING ESSENTIALLY OF SIO2 IN AMOUNT FROM ABOUT 46 TO ABOUT 61 PERCENT, AL2O3 IN AMOUNT FROM ABOUT 8 TO ABOUT 16 PERCENT, TIO2 IN AMOUNT FROM ABOUT 6 TO ABOUT 15 PERCENT, AN ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF NA2O, K2O AND MIXTURES THEREOF, SAID ALKALI METAL OXIDES BEING PRESENT IN AMOUNT FROM ABOUT 5 TO ABOUT 18 PERCENT, AN ALKALINE EARTH METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF CAO, MGO AND SRO AND MIXTURES THEREOF, SAID ALKALINE EARTH METAL OXIDE BEING PRESENT IN AMOUNT FROM ABOUT 6 TO ABOUT 14 PERCENT, SAID GLAZE ALSO CONTAINING FROM ABOUT 0.2 TO ABOUT 8 PERCENT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ANTIMONY OXIDE, TANTALUM OXIDE AND TUNGSTEN OXIDE, ALL PERCENTAGES EXPRESSED ON A WEIGHT BASIS, THEREBY PREVENTING PHOTOSENSITIVITY IN SAID GLAZE.
Claim 2
Dependent Claim
140 words
A CERAMIC GLAZE CONSISTING ESSENTIALLY OF SIO2 IN AMOUNT FROM ABOUT 46 TO ABOUT 61 PERCENT, AL2O3 IN AMOUNT FROM ABOUT 8 TO ABOUT 16 PERCENT, TIO2 IN AMOUNT FROM ABOUT 6 TO ABOUT 15 PERCENT, AN ALKALI METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF NA2O, K2O AND MIXTURES THEREOF, SAID ALKALI METAL OXIDES BEING PRESENT IN AMOUNT FROM ABOUT 5 TO ABOUT 18 PERCENT, AN ALKALINE EARTH METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF CAO, MGO AND SRO AND MIXTURES THEREOF, SAID ALKALINE EARTH METAL OXIDE BEING PRESENT IN AMOUNT FROM ABOUT 6 TO ABOUT 14 PERCENT, SAID GLAZE ALSO CONTAINING FROM ABOUT 0.2 TO ABOUT 8 PERCENT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ANTIMONY OXIDE, TANTALUM OXIDE AND TUNGSTEN OXIDE, ALL PERCENTAGES EXPRESSED ON A WEIGHT BASIS, THEREBY PREVENTING PHOTOSENSITIVITY IN SAID GLAZE.
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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |