Patent US3573208A successfully refreshed from Google Patents.
US3573208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing ferrites of high resistivity
Assignee: US Philips Corp
•
Filing: 1968-09-19
•
Granted: 1971-03-30
•
Expires: 1988-09-19
Abstract
Abstract A METHOD OF MANUFACTURING FERRITES OF HIGH RESISTIVITY AND UQ PRODUCT BY ACCURATE CONTROL OF THE COMPOSITION. IN THIS METHOD TWO FERRITES OF APPROXIMATELY THE SAME COMPOSITION, BUT DIFFERING SLIGHTLY IN STOICHIOMETRY, ARE BLENDED TO FORM A COMPOSITION OF OPTIMUM STOICHIOMETRY FOR MAXIMUM RESISTIVITY AND UQ PRODUCT.
Inventors
- 👤 Frank G Brockman
- 👤 Kenneth E Matteson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:16
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |