US2823097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of silicates
Assignee: Pennwalt Corp
•
Filing: 1954-05-28
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Granted: 1958-02-11
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Expires: 1974-05-28
Abstract
No abstract record available.
Inventors
- 👤 Mockrin Isadore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:37
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN THE PREPARATION OF ALKALI METAL SILICATES, THE PROCESS WHICH COMPRISES PREPARING A MIXTURE OF AN ALKALI METAL CARBONATE AND SILICON DIOXIDE TO WHICH AN INORGANIC HALOGEN COMPOUND HAS BEEN ADDED, SAID INORGANIC HALOGEN COMPOUND BEING ADDED IN AMOUNT AT LEAST SUFFICIENT TO PRODUCE A SUBSTANTIAL INCREASE IN THE RATE OF REACTION OF SAID ALKALI METAL CARBONATE WITH SAID SILICON DIOXIDE, AND HEATING SAID MIXTURE IN A SUBSTANTIALLY DRY STATE TO A TEM-
Claim 2
Dependent Claim
73 words
IN THE PREPARATION OF ALKALI METAL SILICATES, THE PROCESS WHICH COMPRISES PREPARING A MIXTURE OF AN ALKALI METAL CARBONATE AND SILICON DIOXIDE TO WHICH AN INORGANIC HALOGEN COMPOUND HAS BEEN ADDED, SAID INORGANIC HALOGEN COMPOUND BEING ADDED IN AMOUNT AT LEAST SUFFICIENT TO PRODUCE A SUBSTANTIAL INCREASE IN THE RATE OF REACTION OF SAID ALKALI METAL CARBONATE WITH SAID SILICON DIOXIDE, AND HEATING SAID MIXTURE IN A SUBSTANTIALLY DRY STATE TO A TEM-
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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |