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Patent US2766211A successfully refreshed from Google Patents.
US2766211A
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Process for making magnetic powder
Assignee: NCR Voyix Corp
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Filing: 1953-05-06
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Granted: 1956-10-09
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Expires: 1973-05-06
Abstract
No abstract record available.
Inventors
- 👤 Paul M Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:59
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70642; C; C01; C01G; C01G49/00; C01G49/02; C01G49/08; C01P; C01P2006/00; C01P2006/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE PROCESS OF MAKING A MATERIAL RICH IN MAGNETIC IRON OXIDE FROM MILL SCALE DERIVED FROM THE WORKING OF RED-HOT IRON AND ITS ALLOYS IN AIR, INCLUDING THE STEP OF MAINTAINING THE MILL SCALE AT A TEMPERATURE OF BETWEEN 475 DEGREES FAHRENHEIT AND 1,200 DEGREES FAHRENHEIT IN AN INERT ATMOSPHERE WITHIN THE TIME LIMITS INDICATED BY THE SHADED AREA BETWEEN LINES A AND B OF THE DRAWING.
Claim 2
Dependent Claim
67 words
THE PROCESS OF MAKING A MATERIAL RICH IN MAGNETIC IRON OXIDE FROM MILL SCALE DERIVED FROM THE WORKING OF RED-HOT IRON AND ITS ALLOYS IN AIR, INCLUDING THE STEP OF MAINTAINING THE MILL SCALE AT A TEMPERATURE OF BETWEEN 475 DEGREES FAHRENHEIT AND 1,200 DEGREES FAHRENHEIT IN AN INERT ATMOSPHERE WITHIN THE TIME LIMITS INDICATED BY THE SHADED AREA BETWEEN LINES A AND B OF THE DRAWING.
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) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |