US3342747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stabilizing silica sols
Assignee: ChampionX LLC
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Filing: 1961-04-17
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Granted: 1967-09-19
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Expires: 1981-04-17
Abstract
No abstract record available.
Inventors
- 👤 Mindick Morris
- 👤 Lewis E Reven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:08
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/146; C01B33/148; C01B33/1485
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN IMPROVEMENT IN A PROCESS FOR STABILIZING A SILICA SOL HAVING AN SIO2 CONTENT OF FROM ABOUT 3% TO ABOUT 50% WHEREIN SAID SOL IS PLACED IN ION EXCHANGE RELATIONSHIP WITH AN ANION EXCHANGE RESIN AND A CATION EXCHANGE RESIN, THE IMPROVEMENT WHICH COMPRISES IN ADDITION TO THE STEP OF PLACING THE SOL IN ION EXCHANGE RELATIONSHIP WITH AN ANION EXCHANGE RESIN, THE STEPS OF PLACING SAID SOL IN ION EXCHANGE RELATIONSHIP WITH A STRONG ACID CATION EXCHANGE RESIN IN THE HYDROGEN FORM; REMOVING SAID SOL FROM CONTACT WITH SAID CATION EXCHANGE RESIN, AGING SAID SOL OUT OF CONTACT WITH SAID CATION EXCHANGE RESIN FOR A PERIOD OF AT LEAST ABOUT ONE HOUR AT A TEMPERATURE VARYING FROM ABOUT 34*F. TO ABOUT THE BOILING POINT OF SAID
Claim 2
Dependent Claim
127 words
AN IMPROVEMENT IN A PROCESS FOR STABILIZING A SILICA SOL HAVING AN SIO2 CONTENT OF FROM ABOUT 3% TO ABOUT 50% WHEREIN SAID SOL IS PLACED IN ION EXCHANGE RELATIONSHIP WITH AN ANION EXCHANGE RESIN AND A CATION EXCHANGE RESIN, THE IMPROVEMENT WHICH COMPRISES IN ADDITION TO THE STEP OF PLACING THE SOL IN ION EXCHANGE RELATIONSHIP WITH AN ANION EXCHANGE RESIN, THE STEPS OF PLACING SAID SOL IN ION EXCHANGE RELATIONSHIP WITH A STRONG ACID CATION EXCHANGE RESIN IN THE HYDROGEN FORM; REMOVING SAID SOL FROM CONTACT WITH SAID CATION EXCHANGE RESIN, AGING SAID SOL OUT OF CONTACT WITH SAID CATION EXCHANGE RESIN FOR A PERIOD OF AT LEAST ABOUT ONE HOUR AT A TEMPERATURE VARYING FROM ABOUT 34*F. TO ABOUT THE BOILING POINT OF SAID
References Cited (Backward Citations)
CA521741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |