Patent US3133820A successfully refreshed from Google Patents.
US3133820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making foamed ceramic products
Assignee: Johns Manville Corp
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Filing: 1959-04-07
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Granted: 1964-05-19
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Expires: 1979-04-07
Abstract
No abstract record available.
Inventors
- 👤 Edward R Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:39
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
THE METHOD OF MANUFACTURING A CERAMIC FOAM PRODUCT COMPRISING FORMING A MOLTEN MATERIAL CONSISTING ESSENTIALLY OF A FLUID MIXTURE OF ROM ABOUT 38% TO ABOUT 42% SILICA, FROM ABOUT 16% TO ABOUT 22% ALUMINA, FROM ABOUT 2% TO ABOUT 12% MAGNESIA, AND FROM ABOUT 20% TO ABOUT 40% LIME, FLOWING A THIN STREAM OF THE MOLTEN MATERIAL, ADJUSTING AND EQUALIZING THE TEMPERATURE OF THE STREAM OF THE MOLTEN MATERIAL TO LESS THAN ABOUT 30*F. ABOVE THE LIQUIDS OF THE SIDE MOLTEN MATERIAL, ADDING TO THE STREAM OF THE MOLTEN MATERIAL FROM ABOUT 0.5% TO ABOUT 3% BY WEIGHT THEREOF OF GRANULAR INORGANIC FOAMING AGENT REACTIVE WITH THE MOLTEN MATERIAL AT A TEMPERATURE ABOVE IT FUSION POINT PRODUCING GAS, REACTING AND MIXING THE SAID INORGANIC FOAMING AGENT WITH THE MOLTEN MATERIAL AT A TEMPERATURE WITHIN THE RANGE CONSISTING OF APPROXIMATELY 30*F. ABOVE THE FUSION POINT OF THE SAID MOLTEN MATERIAL AND THEREBY LIBERATING GAS THROUGHOUT THE MOLTEN MATERIAL AND FOAMING THE MASS THEREOF, AND COOLING THE FOAMED MASS TO FORM A CELLULAR CERAMIC PRODUCT.
Claim 2
Independent Claim
173 words
THE METHOD OF MANUFACTURING A CERAMIC FOAM PRODUCT COMPRISING FORMING A MOLTEN MATERIAL CONSISTING ESSENTIALLY OF A FLUID MIXTURE OF ROM ABOUT 38% TO ABOUT 42% SILICA, FROM ABOUT 16% TO ABOUT 22% ALUMINA, FROM ABOUT 2% TO ABOUT 12% MAGNESIA, AND FROM ABOUT 20% TO ABOUT 40% LIME, FLOWING A THIN STREAM OF THE MOLTEN MATERIAL, ADJUSTING AND EQUALIZING THE TEMPERATURE OF THE STREAM OF THE MOLTEN MATERIAL TO LESS THAN ABOUT 30*F. ABOVE THE LIQUIDS OF THE SIDE MOLTEN MATERIAL, ADDING TO THE STREAM OF THE MOLTEN MATERIAL FROM ABOUT 0.5% TO ABOUT 3% BY WEIGHT THEREOF OF GRANULAR INORGANIC FOAMING AGENT REACTIVE WITH THE MOLTEN MATERIAL AT A TEMPERATURE ABOVE IT FUSION POINT PRODUCING GAS, REACTING AND MIXING THE SAID INORGANIC FOAMING AGENT WITH THE MOLTEN MATERIAL AT A TEMPERATURE WITHIN THE RANGE CONSISTING OF APPROXIMATELY 30*F. ABOVE THE FUSION POINT OF THE SAID MOLTEN MATERIAL AND THEREBY LIBERATING GAS THROUGHOUT THE MOLTEN MATERIAL AND FOAMING THE MASS THEREOF, AND COOLING THE FOAMED MASS TO FORM A CELLULAR CERAMIC PRODUCT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |