US3781225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of colloidal zeolites
Assignee: Mobil Oil AS
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Filing: 1972-04-17
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Granted: 1973-12-25
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Expires: 1992-04-17
Abstract
Abstract THIS INVENTION RELATES TO TREATMENT OF FORMED COLLOIDAL SIZE ZEOLITES TO FACILITATE SUBSEQUENT PROCESSING BY REMOVING SOLUBLE SALTS FROM AQUEOUS SUSPENSION OF SAID COLLOIDAL ZEOLITE IN THE MOTHER LIQUOR REMAINING AFTER CRYSTALLIZATION, WITHOUT APPRECIABLY CHANGING THE ZEOLITE CONCENTRATION IN THE SUSPENSION. SUCH TREATMENT INVOLVES CONTACTING SAID ZEOLITE SUSPENSION WITH CATION AND ANION EXCHANGE RESIN PARTICLES LARGER THAN ABOUT 10 MICRONS IN DIAMETER.
Inventors
- 👤 A Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:38
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16; B; B01; B01D; B01D61/00; B01D61/24; B01D61/246; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/183; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2815; C01B33/2838; C01B33/2861; C01B33/2869; C01B39/00; C01B39/02; C01B39/36; C01B39/38; C01B39/40; C07; C07C; C07C4/00; C07C4/02; C07C4/06; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/60
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |