US3383386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making alkali metal quaternary ammonium silicates
Assignee: PQ Corp
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Filing: 1965-10-21
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Granted: 1968-05-14
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Weldes Helmut Hans Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:05
CPC Classifications
—
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
144 words
A METHOD OF PREPARING COMPOUNDS HAVING THE FORMULA: M2O$X(NNRPS)2O$YSIO2$ZH2O WHEREIN: M REPRESENTS AT LEAST ONE ALKALI METAL; X IS BETWEEN ABOUT 0.5 AND 1.5; N INDICATES THE NUMBER OF NITROGEN ATOMS AND IS A SMALL INTEGER LESS THAN 10; R REPRESENTS AN ORGANIC RADICAL THAT FORMS AN NR BASE SELECTED FROM THE GROUP CONSISTING OF ALKYLAMINES, ALKANOLAMINES, HETEROCYCLIC AMINES AND CYCLIC AMINES WHICH PRODUCE SOLUTIONS WITH A PH OF AT LEAST 9; P IS EQUAL TO THE NUMBER OF R GROUPS AND IS AT LEAST 4 AND UP TO 4N; S IS AN INTEGER FROM 1 TO P INDICATING THE NUMBER OF DIFFERENT TYPES OF R GROUPS; Y IS BETWEEN 2 AND 10; Z IS BETWEEN 1 AND 40; WHICH COMPRISES REACTING A QUATERNARY AMMONIUM HYDROXIDE HAVING A PH OF AT LEAST 9 WITH AN ALKALI METAL SILICATE, CRYSTALLIZING AND RECOVERING THE CRYSTALLIZED PRODUCT.
Claim 2
Independent Claim
144 words
A METHOD OF PREPARING COMPOUNDS HAVING THE FORMULA: M2O$X(NNRPS)2O$YSIO2$ZH2O WHEREIN: M REPRESENTS AT LEAST ONE ALKALI METAL; X IS BETWEEN ABOUT 0.5 AND 1.5; N INDICATES THE NUMBER OF NITROGEN ATOMS AND IS A SMALL INTEGER LESS THAN 10; R REPRESENTS AN ORGANIC RADICAL THAT FORMS AN NR BASE SELECTED FROM THE GROUP CONSISTING OF ALKYLAMINES, ALKANOLAMINES, HETEROCYCLIC AMINES AND CYCLIC AMINES WHICH PRODUCE SOLUTIONS WITH A PH OF AT LEAST 9; P IS EQUAL TO THE NUMBER OF R GROUPS AND IS AT LEAST 4 AND UP TO 4N; S IS AN INTEGER FROM 1 TO P INDICATING THE NUMBER OF DIFFERENT TYPES OF R GROUPS; Y IS BETWEEN 2 AND 10; Z IS BETWEEN 1 AND 40; WHICH COMPRISES REACTING A QUATERNARY AMMONIUM HYDROXIDE HAVING A PH OF AT LEAST 9 WITH AN ALKALI METAL SILICATE, CRYSTALLIZING AND RECOVERING THE CRYSTALLIZED PRODUCT.
Claim 3
Dependent Claim
13 words
THE METHOD ACCORDING TO CLAIM 1 WHEREIN SAID HYDROXIDE IS N,N''-BIS-BETA-HYDROXYETHYL MORPHOLINIUM HYDROXIDE.
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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |