US3055833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixed ferrospinels
Assignee: RCA Corp
•
Filing: 1957-10-31
•
Granted: 1962-09-25
•
Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 Philip K Baltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:08
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A MIXED FERROSPINEL HAVING A SUBSTANTIALLY RECTANGULAR HYSTERESIS LOOP AND PREPARED BY HEATING AT ABOUT 900 TO 1300* C, IN OXYGEN AT ABOUT ATMOSPHERIC PRESSURE A MIXTURE CONSISTING ESSENTIALLY OF METAL OXIDES IN PROPORTIONS CORRESPONDING TO THE MOLAR COMPOSITION:
Claim 2
Dependent Claim
39 words
A MIXED FERROSPINEL HAVING A SUBSTANTIALLY RECTANGULAR HYSTERESIS LOOP AND PREPARED BY HEATING AT ABOUT 900 TO 1300* C, IN OXYGEN AT ABOUT ATMOSPHERIC PRESSURE A MIXTURE CONSISTING ESSENTIALLY OF METAL OXIDES IN PROPORTIONS CORRESPONDING TO THE MOLAR COMPOSITION:
References Cited (Backward Citations)
CA571642A
Cited
US2576456A
Cited
US2565861A
Cited
GB677418A
Cited
GB735375A
Cited
GB737284A
Cited
US2961407A
Cited
FR1128631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |