US3728274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing spheres of uranium oxide and uranium oxide-plutonium oxide,having a controlled porosity
Assignee: SnamProgetti SpA
•
Filing: 1969-12-05
•
Granted: 1973-04-17
•
Expires: 1989-12-05
Abstract
Abstract THIS INVENTION RELATES TO A PROCESS FOR THE PRODUCTION OF A POROUS REFRACTORY MATERIAL WHICH COMPRISES URANIUM OXIDE AND AN OXIDE SELECTED FROM THE GROUP CONSISTING OF THE OXIDES OF THORIUM, PLUTOMIUM, BERYLLIUM, SILICON, ALUMINUM AND MAGNESIUM, WHICH PROCESS COMPRISES HEATING THE REFACTORY MATERIAL IN AN INERT OR OXIDIZING ATMSOPHERE, REPLACING THE INERT OR OXIDIZING ATMOSPHERE BY A REDUCING ATMOSPHERE, FURTHER INCREASING THE EMPERATURE OF THE HEATED REFRACTORY MATERIAL TO PRODUCE A MATERIAL HAVING POROSITY OF FROM 2% TO 30%.
Inventors
- 👤 P Gerontopoulos
- 👤 D Neri
- 👤 R Renzoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:54
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/02; B01J2/06; B01J2/08; C; C01; C01G; C01G43/00; C01G43/01; C01G43/025; C01G56/00; C01G56/004; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2006/00; C01P2006/14
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |