US3317643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing high temperature calcium silicates
Assignee: Owens Corning
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Filing: 1965-09-03
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Granted: 1967-05-02
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Expires: 1985-09-03
Abstract
No abstract record available.
Inventors
- 👤 Grace D Denny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:56
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A METHOD OF PRODUCING A PRE-HARDEENED HYDROUS CALCIUM SILICATE PRODUCT SUITABLE FOR TRANSFORMATION INTO SYNTHETIC XONOLITE FOR USE AS A THERMAL INSULATING MATERIAL AT TEMPERATURES SUBSTANTIALLY IN EXCESS OF 1200*F. INCLUDING THE STEPS OF: UNIFORMLY HEAT AND MIXING PARTICLES OF SILICEOUS MATERIAL TOGEHTER WITH FINELY COMMINUTED LINE AND WHICH WATER TO FORM AN IN TIMATELY MIXED SLURRY OF REACTANTS CONSISTING ESSENTIALLY OF LIME, SILICA AND WATER AND HAVING A TEMPERATURE BETWEEN ABOUT 170*F. AND THE BOILING TEMPERATURE OF SAID SLURRY; PLACING THE HEATED SLURRY IN A CLOSED MOLD; FURTHER HEATING SAID SLURRY WHILE WITHIN SAID MOLD TO A VAPOR PRESSURE OF ABOUT 40 P.S.I.G. PRESSURE WHILE MAINTAINING THE SLURRY BELOW THE
Claim 2
Dependent Claim
112 words
IN A METHOD OF PRODUCING A PRE-HARDEENED HYDROUS CALCIUM SILICATE PRODUCT SUITABLE FOR TRANSFORMATION INTO SYNTHETIC XONOLITE FOR USE AS A THERMAL INSULATING MATERIAL AT TEMPERATURES SUBSTANTIALLY IN EXCESS OF 1200*F. INCLUDING THE STEPS OF: UNIFORMLY HEAT AND MIXING PARTICLES OF SILICEOUS MATERIAL TOGEHTER WITH FINELY COMMINUTED LINE AND WHICH WATER TO FORM AN IN TIMATELY MIXED SLURRY OF REACTANTS CONSISTING ESSENTIALLY OF LIME, SILICA AND WATER AND HAVING A TEMPERATURE BETWEEN ABOUT 170*F. AND THE BOILING TEMPERATURE OF SAID SLURRY; PLACING THE HEATED SLURRY IN A CLOSED MOLD; FURTHER HEATING SAID SLURRY WHILE WITHIN SAID MOLD TO A VAPOR PRESSURE OF ABOUT 40 P.S.I.G. PRESSURE WHILE MAINTAINING THE SLURRY BELOW THE
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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |