US3227570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium silicate insulating material and method of producing same
Assignee: Owens Corning
•
Filing: 1961-11-14
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Granted: 1966-01-04
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Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 Dana L Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:05
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN THE METHOD OF PRODUCING A DRY, SOLID, INTEGRAL HYDROUS CALCIUM SILICAE, WHERIEN A SLURRY OF WATER, LIME AND SILICA-CONTRIBUTING SUBSTANCE IS FORMED, WITH A LIME/ SILICA RATIO IN THE RANGE OF 0.6/ TO 1.0 MOL OF LINE TO 1.0 MOL OF SILICA AND SAID SLURRY IS SUBSEQUENTLY STEAM INDURATED AT ELEVATED TEMPERATURES UNDER STEAM PRESSURE; THE IMPROVEMENT WHEREBY THERE IS ADDED FROM ABOUT 0.01 TO ABOUT 0.5% BASED ON THE DRY WEIGHT OF THE SOLIDS IN SAID SLURRY OF AN ALKYL NAPHTHALENE METAL SULFONATE, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM, SAID ALKYL GROUP BEING ONE POSSESSING 3 TO 9 CARBON ATOMS INCLUSIVE.
Claim 2
Dependent Claim
109 words
IN THE METHOD OF PRODUCING A DRY, SOLID, INTEGRAL HYDROUS CALCIUM SILICAE, WHERIEN A SLURRY OF WATER, LIME AND SILICA-CONTRIBUTING SUBSTANCE IS FORMED, WITH A LIME/ SILICA RATIO IN THE RANGE OF 0.6/ TO 1.0 MOL OF LINE TO 1.0 MOL OF SILICA AND SAID SLURRY IS SUBSEQUENTLY STEAM INDURATED AT ELEVATED TEMPERATURES UNDER STEAM PRESSURE; THE IMPROVEMENT WHEREBY THERE IS ADDED FROM ABOUT 0.01 TO ABOUT 0.5% BASED ON THE DRY WEIGHT OF THE SOLIDS IN SAID SLURRY OF AN ALKYL NAPHTHALENE METAL SULFONATE, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM, SAID ALKYL GROUP BEING ONE POSSESSING 3 TO 9 CARBON ATOMS INCLUSIVE.
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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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |