Patent US3257220A successfully refreshed from Google Patents.
US3257220A
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Method of manufacturing calcium silicate insulating materials
Assignee: Owens Corning
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Filing: 1963-11-04
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Granted: 1966-06-21
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Expires: 1983-11-04
Abstract
No abstract record available.
Inventors
- 👤 George L Kalousek
- 👤 Dana L Bishop
- 👤 Richard F Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:39
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
THE METHOD OF PRODUCING A HYDROUS CALCIUM SILICATE INSULATING MATERIAL WHICH COMPRISES PREPARING AN AQUEOUS SLURRY INCLUDING LIME AND SILICA IN RELATIVE MOLECULAR PROPORTION RANGING FROM ABOUT 0.65 TO 1.1 MOL OF CAO TO 1.0 MOL SIO2, ADDING THERETO AN AQUEOUS SILICA SOL CONSTITUTING A DEIONIZED ALKALI METAL SILICATE, SAID SOL BEING ADDED IN AN AMOUNT RANGING FROM ABOUT 1 TO 8% BY WEIGHT OF THE TOTAL SLURRY SOLIDS ON A SOLIDS BASIS, LOCATING SAID SLURRY IN A CONTAINER DEFINITIVE OF THE CONTOUR DESIRED FOR THE FINAL SOLID MATERIAL, SUBJECTING THE SLURRY TO A TEMPERATURE OF FROM 150*F. TO 210*F. FOR FROM ABOUT 1 HOUR TO ABOUT 2 1/2 HOURS AND SUBJECTING SAID SLURRY TO STEAM INDURATION INCLUDING A TEMPERATURE OF AT LEAST ABOUT 140*C. AND A PRESSURE OF AT LEAST ABOUT 75 POUNDS PER SQUARE INCH.
Claim 2
Independent Claim
137 words
THE METHOD OF PRODUCING A HYDROUS CALCIUM SILICATE INSULATING MATERIAL WHICH COMPRISES PREPARING AN AQUEOUS SLURRY INCLUDING LIME AND SILICA IN RELATIVE MOLECULAR PROPORTION RANGING FROM ABOUT 0.65 TO 1.1 MOL OF CAO TO 1.0 MOL SIO2, ADDING THERETO AN AQUEOUS SILICA SOL CONSTITUTING A DEIONIZED ALKALI METAL SILICATE, SAID SOL BEING ADDED IN AN AMOUNT RANGING FROM ABOUT 1 TO 8% BY WEIGHT OF THE TOTAL SLURRY SOLIDS ON A SOLIDS BASIS, LOCATING SAID SLURRY IN A CONTAINER DEFINITIVE OF THE CONTOUR DESIRED FOR THE FINAL SOLID MATERIAL, SUBJECTING THE SLURRY TO A TEMPERATURE OF FROM 150*F. TO 210*F. FOR FROM ABOUT 1 HOUR TO ABOUT 2 1/2 HOURS AND SUBJECTING SAID SLURRY TO STEAM INDURATION INCLUDING A TEMPERATURE OF AT LEAST ABOUT 140*C. AND A PRESSURE OF AT LEAST ABOUT 75 POUNDS PER SQUARE INCH.
References Cited (Backward Citations)
US2547127A
Cited
US2665996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |