Patent US3306742A successfully refreshed from Google Patents.
US3306742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a magnetic sheet
Assignee: Individual
•
Filing: 1964-08-31
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Granted: 1967-02-28
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Expires: 1984-08-31
Abstract
No abstract record available.
Inventors
- 👤 Adams Edmond
- 👤 Jr Horace H Helms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:27
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14791; H01F1/14775
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE METHOD OF MAKING A TERNARY MAGNETIC ALLOY CONTAINING ABOUT 4-9% AL, 6-12% SI, AND THE REMINDER ESSENTIALLY FE COMPRISING THE STEPS OF PULVERIZING INTO A POWDER A MASTER ALLOY CONTAINING THE TOTAL PREDETERMINED AMOUNTS OF AL AND SI DESIRED IN THE FINAL ALLOY ONLY 75% OF THE TOTAL PREDETERMINED AMOUNT OF FE DESIRED IN THE FINAL ALLOY, ADDING FE POWDER TO THE POWDERED MASTER ALLOY IN AN AMOUNT WHICH, WHEN ADDED TO THE AMOUNT OF FE PRESENT IN THE POWDERED MASTER ALLOY, EQUALS A PREDETERMINED AMOUNT OF FE DESIRED IN THE FINAL ALLOY, AND THROROUGHLY MIXING SAID POWDERS, COMPACTING OR ROLLING THE POWDERED MIXTURE INTO A SHEET, AND SINTERING SAID SHEET AT A TEMPERATURE OF 1000 C. TO 1400* C. FOR 1 TO 16 HOURS IN AN INERT GAS AMOSPHERE.
Claim 2
Independent Claim
131 words
THE METHOD OF MAKING A TERNARY MAGNETIC ALLOY CONTAINING ABOUT 4-9% AL, 6-12% SI, AND THE REMINDER ESSENTIALLY FE COMPRISING THE STEPS OF PULVERIZING INTO A POWDER A MASTER ALLOY CONTAINING THE TOTAL PREDETERMINED AMOUNTS OF AL AND SI DESIRED IN THE FINAL ALLOY ONLY 75% OF THE TOTAL PREDETERMINED AMOUNT OF FE DESIRED IN THE FINAL ALLOY, ADDING FE POWDER TO THE POWDERED MASTER ALLOY IN AN AMOUNT WHICH, WHEN ADDED TO THE AMOUNT OF FE PRESENT IN THE POWDERED MASTER ALLOY, EQUALS A PREDETERMINED AMOUNT OF FE DESIRED IN THE FINAL ALLOY, AND THROROUGHLY MIXING SAID POWDERS, COMPACTING OR ROLLING THE POWDERED MIXTURE INTO A SHEET, AND SINTERING SAID SHEET AT A TEMPERATURE OF 1000 C. TO 1400* C. FOR 1 TO 16 HOURS IN AN INERT GAS AMOSPHERE.
References Cited (Backward Citations)
CA683592A
Cited
US3144330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |