US3781226A
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 ZEOLITE TO FACILITATE SUBSEQUENT PROCESSING BY REMOVING SOLUBLE SALTS FROM AN 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 THE AQUEOUS SUSPENSION OF THE ZEOLITE WITH A SEMIPERMEABLE MEMBRANE WHICH IS IN CONTACT, AT THE SIDE OPPOSITE THE ZEOLITE SUSPENSION, WITH AN AQUEOUS TREATING SOLUTION.
Inventors
- 👤 A Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:18
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 |