US2880097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zircon refractory composition and method of making it
Assignee: PPG Industries Inc
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Filing: 1954-12-30
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Granted: 1959-03-31
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Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 Donald E Emhiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:15
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A FLUID COMPOSITION SUITABLE FOR FORMING REFACTORY ARTICLE CONSISTING ESSENTIALLY OF ZIRCON, 0.05 TO 0.1 PART OF SODIUM SILICATE, 9 TO 10 PARTS OF WATER AND 0.002 TO 0.03 PART OF A MATERIAL CAPABLE OF PROVIDING ALKALINE EARTH METAL CATIONS IN SAID WATER PER 100 PARTS OF ZIRCON SAID SODIUM SILICATE CONTAINING 6 TO 10% BY WEIGHT OF SODIUM OXIDE AND THE WEIGHT RATIO OF SODIUM OXIDE TO SILICA BEING BETWEEN 1:3 AND 1:4
Claim 2
Dependent Claim
74 words
A FLUID COMPOSITION SUITABLE FOR FORMING REFACTORY ARTICLE CONSISTING ESSENTIALLY OF ZIRCON, 0.05 TO 0.1 PART OF SODIUM SILICATE, 9 TO 10 PARTS OF WATER AND 0.002 TO 0.03 PART OF A MATERIAL CAPABLE OF PROVIDING ALKALINE EARTH METAL CATIONS IN SAID WATER PER 100 PARTS OF ZIRCON SAID SODIUM SILICATE CONTAINING 6 TO 10% BY WEIGHT OF SODIUM OXIDE AND THE WEIGHT RATIO OF SODIUM OXIDE TO SILICA BEING BETWEEN 1:3 AND 1:4
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |