US3751366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing ferrite and garnet raw materials for microwave applications
Assignee: United States Department of the Army
•
Filing: 1971-06-04
•
Granted: 1973-08-07
•
Expires: 1991-06-04
Abstract
Abstract A NOVEL PROCESS FOR PREPARING FERRITE AND GARNET MATERIALS BY MIXING DESIRED METAL SALTS IN THE FORM OF AQUEOUS SOLUTIONS, SPRAY DRYING SAID AQUEOUS SOLUTIONS TO FORM A POWDERY MATERIAL, PRESINTERING THE POWDERY MATERIAL IN AN AIR OR OXYGEN ATOMSPHERE TO CONVERT THE MATERIAL TO MIXED OXIDES HAVING A FERRIMAGNETIC CRYSTAL STRUCTURE, IN SOME CASES MILLING THE PRESINTERED MATERIAL TO BREAK UP THE PARTICLES, MOLDING INTO THE DESIRED FORM THE RESULTING POWDER WHETHER MILLED OR NOT, AND LAST, SINTERING THE FORMED MATERIAL BY HEATING TO THE DESIRED TEMPERATURE FOR SINTERING.
Inventors
- 👤 S Bomar
- 👤 R Clem
- 👤 R Buckelew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:17
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2675
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |