US2904444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making calcareous-silicious insulating material
Assignee: Fibreboard Paper Products Corp
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Filing: 1957-11-26
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Granted: 1959-09-15
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Expires: 1977-11-26
Abstract
No abstract record available.
Inventors
- 👤 Harry P Hoopes
- 👤 Horst L Weber
- 👤 Jr Jesse Ray Neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:56
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN THE METHOD OF MAKING A LIGHT WEIGHT MASS OF HEAT INSULATING MATERIAL FROM AN AQUEOUS SLURRY CONSISTING ESSENTIALLY OF LIME, ESSENTIALLY SILICA REACTABLE WITH SAID LIME, AND NON-COMBUSTIBLE REINFORCING FIBER FOR THE FINAL PRODUCT, WHERE IN THE SLURRY IS SET IN A MOLD, AND IS SUBJECTED TO AN INDURATING TREATMENT; THE STEPS COMPRISING MIXING IN THE SLURRY AN ACCELERATOR SELECTED FROM THE GROUP CONSISTING OF ANHYDROUS SODIUM SILICATE AND ANHYDROUS POTASSIUM SILICATE TO MINIMIZE SHRINKAGE OF THE SET INSULATING MATERIAL FROM THE MOLD DIMENSIONS, SAID ACCELERATOR HAVING A MOL RATIO OF ALKALI METAL OXIDE TO SILICA BETWEEN ABOUT 1 TO 2 AND 1 TO 3.25,, AND SAID ACCELERATOR BEING PRESENT IN AN AMOUNT OF BETWEEN ABOUT 1 TO 20 PERCENT BY WEIGHT OF THE SOLIDS IN SAID SLURRY ON THE DRY BASIS.
Claim 2
Dependent Claim
133 words
IN THE METHOD OF MAKING A LIGHT WEIGHT MASS OF HEAT INSULATING MATERIAL FROM AN AQUEOUS SLURRY CONSISTING ESSENTIALLY OF LIME, ESSENTIALLY SILICA REACTABLE WITH SAID LIME, AND NON-COMBUSTIBLE REINFORCING FIBER FOR THE FINAL PRODUCT, WHERE IN THE SLURRY IS SET IN A MOLD, AND IS SUBJECTED TO AN INDURATING TREATMENT; THE STEPS COMPRISING MIXING IN THE SLURRY AN ACCELERATOR SELECTED FROM THE GROUP CONSISTING OF ANHYDROUS SODIUM SILICATE AND ANHYDROUS POTASSIUM SILICATE TO MINIMIZE SHRINKAGE OF THE SET INSULATING MATERIAL FROM THE MOLD DIMENSIONS, SAID ACCELERATOR HAVING A MOL RATIO OF ALKALI METAL OXIDE TO SILICA BETWEEN ABOUT 1 TO 2 AND 1 TO 3.25,, AND SAID ACCELERATOR BEING PRESENT IN AN AMOUNT OF BETWEEN ABOUT 1 TO 20 PERCENT BY WEIGHT OF THE SOLIDS IN SAID SLURRY ON THE DRY BASIS.
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) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |