Patent US2689245A successfully refreshed from Google Patents.
US2689245A
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Organic nitrogen base silicates and method of producing same
Assignee: PQ Corp
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Filing: 1949-09-28
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Granted: 1954-09-14
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Expires: 1969-09-28
Abstract
No abstract record available.
Inventors
- 👤 Reynold C Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:56
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/025; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN THE MANUFACTURE OF ORGANIC NITROGEN BASE SILICATES, THE PROCESS WHICH COMPRISES REACTING A SILICA WHICH IS SOLUBLE IN AQUEOUS ALKALIS WITH A SUBSTANTIALLY SATURATED SOLUTION OF A FREE ORGANIC NITROGEN BASE HAVING A DISSOCIATION CONSTANT OF AT LEAST ABOUT 10-5, SAID SOLUTION HAVING A PH OF AT LEAST ABOUT 9.5 AND CONTAINING DISSOLVED THEREIN AT LEAST ABOUT 0.1% BY WEIGHT OF SAID NITROGEN BASE, AND CRYSTALLIZING FROM THE RESULTING ALKALINE-REACTING SOLUTION AN ORGANIC NITROGEN BASE SILICATE.
Claim 2
Dependent Claim
77 words
IN THE MANUFACTURE OF ORGANIC NITROGEN BASE SILICATES, THE PROCESS WHICH COMPRISES REACTING A SILICA WHICH IS SOLUBLE IN AQUEOUS ALKALIS WITH A SUBSTANTIALLY SATURATED SOLUTION OF A FREE ORGANIC NITROGEN BASE HAVING A DISSOCIATION CONSTANT OF AT LEAST ABOUT 10-5, SAID SOLUTION HAVING A PH OF AT LEAST ABOUT 9.5 AND CONTAINING DISSOLVED THEREIN AT LEAST ABOUT 0.1% BY WEIGHT OF SAID NITROGEN BASE, AND CRYSTALLIZING FROM THE RESULTING ALKALINE-REACTING SOLUTION AN ORGANIC NITROGEN BASE SILICATE.
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) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |