US2728054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferromagnetic ceramic inductance core
Assignee: Steatite Research Corp
•
Filing: 1951-09-20
•
Granted: 1955-12-20
•
Expires: 1971-09-20
Abstract
No abstract record available.
Inventors
- 👤 Albers-Schoenberg Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:40
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/255; G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; H01F1/00; H01F1/01; H01F1/03; H01F1/0302; H01F1/0311; H01F1/0313; H01F1/0315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A FERROMAGNETIC INDUCTANCE CORE OF THE TYPE HAVING A GAP OF FINITE LENGTH IN THE MAGNETIC MATERIAL THEREOF, SAID CORE BEING FORMED IN AT LEAST TWO PARTS, THE SAID TWO PARTS HAVING AT LEAST TWO SEPARATE SUBSTANTIALLY PLANAR CONTACTING AREAS THEREBETWEEN, A FIRST ONE OF SAID PARTS CONSISTING ESSENTIALLY OF A CERAMIC FERROMAGNETIC FERRITE, A FIRST OF SAID CONTACTING AREAS OF SAID FIRST PART MAKING FERROMAGNETIC CONTACT WITH THE CORRESPONDING CONTACTING SURFACES OF A SECOND OF SAID PARTS WHEN THE PARTS ARE AS SEMBLED WITH A COIL THEREON, A SECOND OF SAID CONTACTING AREAS OF SAID FIRST PART CONTAINING A CERAMIC GLAZE WHICH CONTACTS A CORRESPONDING AREA OF SAID SECOND PART WHEN THE PARTS ARE ASSEMBLED WHEREBY THE SAID GLAZE FORMS AN ACCURATE AND INVARIABLE GAP BETWEEN THE CORRESPONDING SECOND CONTACTING AREAS OF THE TWO PARTS.
Claim 2
Dependent Claim
136 words
A FERROMAGNETIC INDUCTANCE CORE OF THE TYPE HAVING A GAP OF FINITE LENGTH IN THE MAGNETIC MATERIAL THEREOF, SAID CORE BEING FORMED IN AT LEAST TWO PARTS, THE SAID TWO PARTS HAVING AT LEAST TWO SEPARATE SUBSTANTIALLY PLANAR CONTACTING AREAS THEREBETWEEN, A FIRST ONE OF SAID PARTS CONSISTING ESSENTIALLY OF A CERAMIC FERROMAGNETIC FERRITE, A FIRST OF SAID CONTACTING AREAS OF SAID FIRST PART MAKING FERROMAGNETIC CONTACT WITH THE CORRESPONDING CONTACTING SURFACES OF A SECOND OF SAID PARTS WHEN THE PARTS ARE AS SEMBLED WITH A COIL THEREON, A SECOND OF SAID CONTACTING AREAS OF SAID FIRST PART CONTAINING A CERAMIC GLAZE WHICH CONTACTS A CORRESPONDING AREA OF SAID SECOND PART WHEN THE PARTS ARE ASSEMBLED WHEREBY THE SAID GLAZE FORMS AN ACCURATE AND INVARIABLE GAP BETWEEN THE CORRESPONDING SECOND CONTACTING AREAS OF THE TWO PARTS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |