US2771376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lining of refractory vessels
Assignee: PPG Industries Inc
•
Filing: 1952-05-08
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Granted: 1956-11-20
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Expires: 1972-05-08
Abstract
No abstract record available.
Inventors
- 👤 John J Capellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:11
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A LINING PASTE FOR LINING GLASS TANK BOTTOM REFRACTORY BLOCKS WHICH CONSISTS OF WATER AND A MIXTURE OF ZIRCONIUM SILICATE AND SODIUM SILICATE, SAID ZIRCONIUM SILICATE HAVING A MAXIMUM PARTICLE SIZE OF ABOUT 100 MESH AND CONSTITUTING 90 TO 99% BY WEIGHT OF THE MIXTURE OF ZIRCONIUM SILICATE AND SODIUM SILICATE, SAID PASTE HAVING A DRY PRESS CONSISTENCY.
Claim 2
Dependent Claim
58 words
A LINING PASTE FOR LINING GLASS TANK BOTTOM REFRACTORY BLOCKS WHICH CONSISTS OF WATER AND A MIXTURE OF ZIRCONIUM SILICATE AND SODIUM SILICATE, SAID ZIRCONIUM SILICATE HAVING A MAXIMUM PARTICLE SIZE OF ABOUT 100 MESH AND CONSTITUTING 90 TO 99% BY WEIGHT OF THE MIXTURE OF ZIRCONIUM SILICATE AND SODIUM SILICATE, SAID PASTE HAVING A DRY PRESS CONSISTENCY.
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) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |