US2880098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory articles and compositions therefor
Assignee: PPG Industries Inc
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Filing: 1956-04-23
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Granted: 1959-03-31
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Expires: 1976-04-23
Abstract
No abstract record available.
Inventors
- 👤 Richard E Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:03
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A COMPOSITION FOR THE PREPARATION OF A REFACTORY L BLOCK FOR A SHEET GLASS DRAWING APPARATUS WHICH COMPRISES A MIXTURE OF SOLIDS CONSISTING ESSENTIALLY OF ABOUT 15 TO 45% BY WEIGHT OF A PLASTIC CLAY, ABOUT 10 TO 65% BY WEIGHT OF A BURNT CLAY AND ABOUT 20 TO 70% BY WEIGHT OF A REFACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF FUSED SILICA, CORDIERITE AND LITHIA-ALUMINA-SILICA, SAID REFACTORY MATERIAL BEING IN THE FORM OF PARTICLES HAVING A MAXIMUM SIZE OF ABOUT 9 MESH AND A MAJOR PORTION OF SAID REFACTORY MATERIAL BEING PRESENT AS PARTICLES LARGER THAN 100 MESH.
Claim 2
Dependent Claim
100 words
A COMPOSITION FOR THE PREPARATION OF A REFACTORY L BLOCK FOR A SHEET GLASS DRAWING APPARATUS WHICH COMPRISES A MIXTURE OF SOLIDS CONSISTING ESSENTIALLY OF ABOUT 15 TO 45% BY WEIGHT OF A PLASTIC CLAY, ABOUT 10 TO 65% BY WEIGHT OF A BURNT CLAY AND ABOUT 20 TO 70% BY WEIGHT OF A REFACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF FUSED SILICA, CORDIERITE AND LITHIA-ALUMINA-SILICA, SAID REFACTORY MATERIAL BEING IN THE FORM OF PARTICLES HAVING A MAXIMUM SIZE OF ABOUT 9 MESH AND A MAJOR PORTION OF SAID REFACTORY MATERIAL BEING PRESENT AS PARTICLES LARGER THAN 100 MESH.
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 |