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US2677802A
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Method and apparatus for demagnetizing material
Assignee: Individual
•
Filing: 1949-11-25
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Granted: 1954-05-04
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Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 Emmett M Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:52
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1360326A
Cited
US1743087A
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US1954996A
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US2406870A
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US2410039A
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US2418553A
Cited
US2421583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |