US3733390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Promotion of crystalline zeolite synthesis
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1971-07-01
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Granted: 1973-05-15
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Expires: 1991-07-01
Abstract
Abstract A PROCESS FOR PROMOTING THE CONVERSION OF CERTAIN CRYSTALLINE ALUMINOSILICATE ZEOLITES INTO CRYSTALLINE ALUMINOSILICATE ZEOLLITED HAVING AN ENTIRELY DIFFERENT CRYSTAL STRUCTURE AND A LOWER SIO2/AL2O3 MOLE RATIO IS DESCRIBED. ADDITION OF CERTAIN SOLUBLE SALTS TO THE CAUSTIC TREATMENT IS THE ESSENTIAL FEATURE, AND IN A MOST PREFERRED EMBODIMENT THE CONVERSION OF CLINOPTILOLITE INTO FAUJASITE IS PROMOTED BY THE ADDITION OF CERTAIN SOLUBLE HALIDES TO THE REACTION MIXTURE.
Inventors
- 👤 H Robson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:01
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2838; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; B01J29/00; B01J29/04; B01J29/06; B01J29/08; C01B33/2869; Y; Y10; Y10S; Y10S423/00; Y10S423/21
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |