US3444458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for detecting variations in magnetic properties of ferromagnetic material
Assignee: RALPH H SCOTT
•
Filing: 1966-11-21
•
Granted: 1969-05-13
•
Expires: 1986-11-21
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:26
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2467211A
Cited
US2503247A
Cited
US2842737A
Cited
US2844788A
Cited
US2942177A
Cited
US3049665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |