US3687650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of bonding ferrite components
Assignee: Fujitsu Services Ltd
•
Filing: 1970-07-30
•
Granted: 1972-08-29
•
Expires: 1990-07-30
Abstract
Abstract A METHOD FOR BONDING FERRITE COMPONENTS IN WHICH A GLASS BONDING MATERIAL IS CAUSED TO FILL THE GAP BETWEEN COMPONENTS. THE COMPONENTS AND GLAS ARE HEATED IN A CLOSED ENVIRONMENT AND THE PRESSURE IS REDUCED. AFTER OUTGASSING OF BUBBLES FROM THE GAP AND FERRITE HAS CEASED, THE PRESSURE IN THE ENVIRONMENT IS INCREASED, WHILE THE HEAT IS AT LEAST MAINTAINED, TO CAUSE THE GLASS TO FLOW INTO AND UNIFORMLY FILL THE GAP. THE GLASS, UPON HARDENING, THEN BONDS THE FERRITE COMPONENTS.
Inventors
- 👤 Derek Frank Case
- 👤 Kenneth Stammers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:18
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/23; G11B5/235; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/0302; H01F1/0311; H01F1/0313; H01F1/0315; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055; Y10T29/49057
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |