US2829030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing alkali metal silicates
Assignee: Henkel AG and Co KGaA
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Filing: 1956-04-17
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Granted: 1958-04-01
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Expires: 1976-04-17
Abstract
No abstract record available.
Inventors
- 👤 Habernickel Valentin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:18
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR PRODUCING SOLUBLE ALKALI METAL SILICATES FROM MIXTURES OF SAND AND ALKALI METAL CHLORIDES AT HIGH TEMPERATURES COMPRISING THE STEPS OF MIXING SAND AND AN ALKALI METAL CHLORIDE, HEATING SAID MIXTURE TO A TEMPERATURE SLIGHTLY ABOVE THE MELTING TEMPERATURE OF THE ALKALI METAL CHLORIDE TO ABOUT 780-850*C., SINTERING THE MIXTURE, COOLING THE SAME, AND THEN DISINTEGRATING THE COOLED, SINTERED MASS BEFORE SUBJECTING THE SAME TO A TREATMENT WITH STEAM AT TEMPERATURES RANGING FROM -900-1400*C.
Claim 2
Dependent Claim
76 words
A PROCESS FOR PRODUCING SOLUBLE ALKALI METAL SILICATES FROM MIXTURES OF SAND AND ALKALI METAL CHLORIDES AT HIGH TEMPERATURES COMPRISING THE STEPS OF MIXING SAND AND AN ALKALI METAL CHLORIDE, HEATING SAID MIXTURE TO A TEMPERATURE SLIGHTLY ABOVE THE MELTING TEMPERATURE OF THE ALKALI METAL CHLORIDE TO ABOUT 780-850*C., SINTERING THE MIXTURE, COOLING THE SAME, AND THEN DISINTEGRATING THE COOLED, SINTERED MASS BEFORE SUBJECTING THE SAME TO A TREATMENT WITH STEAM AT TEMPERATURES RANGING FROM -900-1400*C.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |