US2783129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of clear aqueous solution of alkali metal silicate
Assignee: WR Grace and Co
•
Filing: 1954-03-18
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Granted: 1957-02-26
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Expires: 1974-03-18
Abstract
No abstract record available.
Inventors
- 👤 Leon L Baral
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:47
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/32; C01B33/325
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD OF CONTINUOUSLY FORMING A CLEAR AQUEOUS SOLUTION OF SODIUM SILICATE WHICH COMPRISES CONTINUOUSLY INTRODUCING THIN RIGID FRAGMENTS OF WARM SODIUM SILICATE INTO A SLOWLY ROTATING ELONGATED HORIZONTAL DISSOLVING ZONE MAINTAINED AT ATMOSPHERIC PRESSURE, CONTINUOUSLY PASSING PREHEATED WATER AT A CONTROLLED ATE INTO SAID ZONE IN CONTACT WITH SAID SILICATE WHEREBY THE CONBINED HEAT FROM SAID SILICATE AND WATER IS SUFFICIENT TO MAINTAIN THE TEMPERATURE OF THE RESULTING SOLUTION UNIFORMLY NEAR BUT BELOW ITS BOILING POINT, AND CONTINUOUSLY WITHDRAWING THE SOLUTION FROM SAID ZONE.
Claim 2
Independent Claim
85 words
A METHOD OF CONTINUOUSLY FORMING A CLEAR AQUEOUS SOLUTION OF SODIUM SILICATE WHICH COMPRISES CONTINUOUSLY INTRODUCING THIN RIGID FRAGMENTS OF WARM SODIUM SILICATE INTO A SLOWLY ROTATING ELONGATED HORIZONTAL DISSOLVING ZONE MAINTAINED AT ATMOSPHERIC PRESSURE, CONTINUOUSLY PASSING PREHEATED WATER AT A CONTROLLED ATE INTO SAID ZONE IN CONTACT WITH SAID SILICATE WHEREBY THE CONBINED HEAT FROM SAID SILICATE AND WATER IS SUFFICIENT TO MAINTAIN THE TEMPERATURE OF THE RESULTING SOLUTION UNIFORMLY NEAR BUT BELOW ITS BOILING POINT, AND CONTINUOUSLY WITHDRAWING THE SOLUTION FROM SAID ZONE.
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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) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |