Catalytic mineral fibers and their preparation
Abstract
Abstract A CATALYTIC MINERAL FIBER CONTAINING AT LEAST 70 PERCENT ALUMINA, LESS THAN 20 PERCENT OF AT LEAST ONE CATALYST DISTRIBUTED WITHIN THE CRYSTALLINE LATTICE OR BETWEEN THE OXIDE CRYSTALS, AND CONTAINING LESS THAN 30 PERCENT OTHER REFRACTORY OXIDES AND LESS THAN 5 PERCENT RECRYSTALLIZATION INHIBITORS, AND HAVING A SPECIFIC B.E.T. SURFACE AT LEAST EQUAL TO 70M.2/G. AND STABLE UP TO AT LEAST 1050%C. THE FIBER IS PRODUCED BY THE PREPARATION OF A SOLUTION IN WATER OF ALUMINUM OXYCHLORIDE AND A HYDROLYZABLE SALT OF A CATALYTIC ELEMENT ALONG WITH RECRYSTALLIZATION INHIBITORS. THE SOLUTION HAS AN ADJUSTED PH BETWEEN 3 AND 5 AND A VISCOSITY ACCEPTABLE TO EXTRUSION, DRAWING, ETC., TO FORM FIBERS THAT ARE CONVERTED INTO INSOLUBLE OXIDES IN AN ATMOSPHERE OF STEAM AT A TEMPERATURE VARIED ACCORDING TO PRESSURE.
Inventors
- 👤 Jean-Pierre Kiehl
- 👤 Gabriel Pupier
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |