US2499729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory compositions for use in foundry and the like
Assignee: Individual
•
Filing: 1945-05-21
•
Granted: 1950-03-07
•
Expires: 1965-05-21
Abstract
No abstract record available.
Inventors
- 👤 Daussan Henri Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:24
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/06; B22D7/062; C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C04B2111/00; C04B2111/00474; C04B2111/00482
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A REFRACTORY COMPOSITION OF MATTER FOR LINING SURFACES SUCH AS MOULDS AND FURNACE WALLS, CONSISTING OF A POWDERED MIXTURE OF ABOUT 42 TO 85% BY WEIGHT OF A COMMINUTED DRY REFRACTORY SUBSTANCE OF THE GROUP CONSISTING OF SILICA (SAND, QUARTZ), SILICEOUS GRAPHITE, CHINA CLAY, CARBORUNDUM, ZIRCON, CHROMITE AND MIXTURES THEREOF, AND ABOUT 58 TO 15% OF NA2SIO3.9H2O HAVING A MELTING POINT OF 43*C. AND WHICH GIVES UP THE WATER OF CRYSTALLIZATION WHEN HEATED ABOVE 43*C. AND PRODUCES SELF-TEMPERING AND SETTING OF THE MIXTURE UPON APPLICATION OVER THE SURFACE TO THE LINED.
Claim 2
Dependent Claim
91 words
A REFRACTORY COMPOSITION OF MATTER FOR LINING SURFACES SUCH AS MOULDS AND FURNACE WALLS, CONSISTING OF A POWDERED MIXTURE OF ABOUT 42 TO 85% BY WEIGHT OF A COMMINUTED DRY REFRACTORY SUBSTANCE OF THE GROUP CONSISTING OF SILICA (SAND, QUARTZ), SILICEOUS GRAPHITE, CHINA CLAY, CARBORUNDUM, ZIRCON, CHROMITE AND MIXTURES THEREOF, AND ABOUT 58 TO 15% OF NA2SIO3.9H2O HAVING A MELTING POINT OF 43*C. AND WHICH GIVES UP THE WATER OF CRYSTALLIZATION WHEN HEATED ABOVE 43*C. AND PRODUCES SELF-TEMPERING AND SETTING OF THE MIXTURE UPON APPLICATION OVER THE SURFACE TO THE LINED.
References Cited (Backward Citations)
US982252A
Cited
US1589604A
Cited
US1688350A
Cited
US1764544A
Cited
US1693923A
Cited
US1889007A
Cited
US2009566A
Cited
US2183424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |