US2803570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making magnetic core layers
Assignee: MICHIGAN BUMPER Corp
•
Filing: 1952-08-05
•
Granted: 1957-08-20
•
Expires: 1972-08-05
Abstract
No abstract record available.
Inventors
- 👤 Wilbur G Hespenheide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:53
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/0206; H01F41/0233; Y; Y10; Y10T; Y10T29/00; Y10T29/30; Y10T29/301; Y10T29/302
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE METHOD OF MAKING A MAGNETIC CORE MATERIAL, WHICH COMPRISES FORMING A CONTINOUS LAYER OF A MAG NETIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF IRON, COBALT, NICKEL, AND ALLOYS THEREOF PARTTALLY OXIDIZING SAID MAGNETIC MATERIAL, FORMING ON SAID LAYER A CONTINUOUS LAYER OF A SECOND METAL WHICH IS MORE ESILY OXIDIZED THAN SAID MAGNETIC MATERIAL, AND THEREAFTER HEATING SAID LAYERS IN AN ESSENTIALY INERT ATMOSPHERE AT A TEMPERATURE BELOW THAT AT WHICH MELTING OF EITHER METAL OR THE OXIDE FORMED TAKEN PLACE UNTIL A LAMINATE OF SAID MAGNETIC MATERIAL AND AN OXIDE OF SAID SECOND METAL IS FORMED.
Claim 2
Independent Claim
99 words
THE METHOD OF MAKING A MAGNETIC CORE MATERIAL, WHICH COMPRISES FORMING A CONTINOUS LAYER OF A MAG NETIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF IRON, COBALT, NICKEL, AND ALLOYS THEREOF PARTTALLY OXIDIZING SAID MAGNETIC MATERIAL, FORMING ON SAID LAYER A CONTINUOUS LAYER OF A SECOND METAL WHICH IS MORE ESILY OXIDIZED THAN SAID MAGNETIC MATERIAL, AND THEREAFTER HEATING SAID LAYERS IN AN ESSENTIALY INERT ATMOSPHERE AT A TEMPERATURE BELOW THAT AT WHICH MELTING OF EITHER METAL OR THE OXIDE FORMED TAKEN PLACE UNTIL A LAMINATE OF SAID MAGNETIC MATERIAL AND AN OXIDE OF SAID SECOND METAL IS FORMED.
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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |