US3767771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of faujasite type zeolites
Assignee: Azote et Produits Chimiques SA
•
Filing: 1971-09-08
•
Granted: 1973-10-23
•
Expires: 1991-09-08
Abstract
Abstract CRYSTALLINE ZEOLITES OF THE FAUJASITE-TYPE CONTAINING NA+ AND K+ CATIONS ARE PRODUCED BY A PROCESS WHEREIN A GEL CONTAINING ALL OF THE NECESSARY ALUMINA IS PREPARED, AMORPHOUS SILICA IS ADDED TO THE GEL IN AN AMOUNT OF AT LEAST 0.5 MOLE OF AMORPHOUS SILICA PER MOLE OF ALUMINA, AND THE RESULTANT MIXTURE CRYSTALLIZED. THE ZEOLITE PRODDUCTS HAVE A HIGH SIO2/AL2O3 RATIO AND EXCELLENT THERMAL STABILITY AND CAN BE USED AS MOLECULAR SIEVES AND CATALYST SUPPORTS.
Inventors
- 👤 J Guth
- 👤 A Pereyron
- 👤 R Wey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:39
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2838; Y; Y10; Y10S; Y10S423/00; Y10S423/21
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |