US2877144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous coated magnetic material
Assignee: Raytheon Co
•
Filing: 1954-05-19
•
Granted: 1959-03-10
•
Expires: 1974-05-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Iversen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:06
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/0302; H01F1/0311; H01F1/0313; H01F1/0315; C; C23; C23D; C23D5/00; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A DEVICE COMPRISING AN ELEMENT COMPOSED OF A POROUS FERROMAGNETIC DIELECTRIC CERAMIC, SID ELEMENT HAVING PREDETERMINED PHYSICAL CHARACTERISTICS; A SINTERED LAYER OF A FIRST TYPE OF GALSS COVERING TRHE EXPOSED SURFACE OF SAID ELEMENT, SAID FIRST RYPE OF GLASS HAVING A PREDETERMINED WORKING TEMPERATURE; AND ACOATING OF A SECOND TYPE OF GLASS DISPOSED ON TOP OF SAID SINTERED LAYER, THE WORKING TEMPERATURE OF SAID SECOND TYPE OF GLASS BEING MORE THAN 80*C. LOWER THAN SAID PREDETERMINED WORKING TEMPERATURE, AND SAID FIRST AND SECOND TYPES OF GLASSES HAVING THERMAL COEFFICIENTS OF EXPANSION OF FROM 65 TO 120X10-7 INCH PER INCH PER DEGREE CENTIGRADE, WHEREBY SAID FIRST AND SECOND TYPES OF GLASS PROVIDE A SEAL HAVING PHYSICAL CHARACTERISTICS SUBSTANTIALLY EQUIVALENT TO SAID PREDETERMINED PHYSICAL CHARACTERISTICS OF THE FERRITE ELEMENT.
Claim 2
Independent Claim
127 words
A DEVICE COMPRISING AN ELEMENT COMPOSED OF A POROUS FERROMAGNETIC DIELECTRIC CERAMIC, SID ELEMENT HAVING PREDETERMINED PHYSICAL CHARACTERISTICS; A SINTERED LAYER OF A FIRST TYPE OF GALSS COVERING TRHE EXPOSED SURFACE OF SAID ELEMENT, SAID FIRST RYPE OF GLASS HAVING A PREDETERMINED WORKING TEMPERATURE; AND ACOATING OF A SECOND TYPE OF GLASS DISPOSED ON TOP OF SAID SINTERED LAYER, THE WORKING TEMPERATURE OF SAID SECOND TYPE OF GLASS BEING MORE THAN 80*C. LOWER THAN SAID PREDETERMINED WORKING TEMPERATURE, AND SAID FIRST AND SECOND TYPES OF GLASSES HAVING THERMAL COEFFICIENTS OF EXPANSION OF FROM 65 TO 120X10-7 INCH PER INCH PER DEGREE CENTIGRADE, WHEREBY SAID FIRST AND SECOND TYPES OF GLASS PROVIDE A SEAL HAVING PHYSICAL CHARACTERISTICS SUBSTANTIALLY EQUIVALENT TO SAID PREDETERMINED PHYSICAL CHARACTERISTICS OF THE FERRITE ELEMENT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |