US2864734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic flake core and method of
Assignee: —
•
Filing: —
•
Granted: 1958-12-16
•
Expires: 1975-12-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:52
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/0206; H01F41/0246; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/22; H01F1/24; B; B22; B22F; B22F1/00; B22F1/16; B22F3/00; B22F3/02; B22F9/00; B22F9/02; B22F9/04; B22F9/06; B22F9/08; B22F9/082; H01F1/33; B22F2998/00; B22F2998/10; C; C22; C22C; C22C2202/00; C22C2202/02; Y; Y10; Y10S; Y10S75/00; Y10S75/954; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE METHOD OF PREPARING A MAGNETIC CORE COMPRISING FORMING FLAKES OF AN IRON BASE ALLOY CONTAINING 10 TO 17 PERCENT ALUMINUM AND THE BALANCE ESSENTIALLY IRON BY ROLLING A POWDER OF SAID ALLOY AT ABOUT 200*C., HEATING SAID FLAKES TO A TEMPERATURE BETWEEN 400* TOO 900*C. FOR A PERIOD OF FROM 15 MINUTES TO 4 HOURS, COMPACTING SAID FLAKES INTO THE DESIRED CORE CONFIGURATION, AND HEAT TREATING THE COMPACTED FLAKE CORE AT A TEMPERATURE OF FROM 400*C. TO 800*C.
Claim 2
Independent Claim
79 words
THE METHOD OF PREPARING A MAGNETIC CORE COMPRISING FORMING FLAKES OF AN IRON BASE ALLOY CONTAINING 10 TO 17 PERCENT ALUMINUM AND THE BALANCE ESSENTIALLY IRON BY ROLLING A POWDER OF SAID ALLOY AT ABOUT 200*C., HEATING SAID FLAKES TO A TEMPERATURE BETWEEN 400* TOO 900*C. FOR A PERIOD OF FROM 15 MINUTES TO 4 HOURS, COMPACTING SAID FLAKES INTO THE DESIRED CORE CONFIGURATION, AND HEAT TREATING THE COMPACTED FLAKE CORE AT A TEMPERATURE OF FROM 400*C. TO 800*C.
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) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |