US3236777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-manganese-ferrous ferrite
Assignee: Ampex Corp
•
Filing: 1963-04-12
•
Granted: 1966-02-22
•
Expires: 1983-04-12
Abstract
No abstract record available.
Inventors
- 👤 Im Ho Bin
- 👤 Donald G Wickham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:38
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A FERROMAGNETIC COMPOSITION CONSISTING OF THE RELATIVE MOLE PERCENTAGES OF NICKEL FERRITE, MANGANESE FERRITE AND FERROUS FERRITE LYING WITH IN THE AREA DEFINED IN THE ACCOMPANYING TERNARY DIAGRAM OF THE DRAWING BY THE SOLID LINES AB, BC, CD AND DA.
Claim 2
Dependent Claim
40 words
A FERROMAGNETIC COMPOSITION CONSISTING OF THE RELATIVE MOLE PERCENTAGES OF NICKEL FERRITE, MANGANESE FERRITE AND FERROUS FERRITE LYING WITH IN THE AREA DEFINED IN THE ACCOMPANYING TERNARY DIAGRAM OF THE DRAWING BY THE SOLID LINES AB, BC, CD AND DA.
References Cited (Backward Citations)
US3030306A
Cited
US3055833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |