US2331418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring magnetic characteristics of materials
Assignee: GEORGE A RUBISSOW
•
Filing: 1940-01-08
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Granted: 1943-10-12
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Expires: 1960-01-08
Abstract
No abstract record available.
Inventors
- 👤 George V Nolde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:09
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/12; G01R33/1223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-10-11 | 1947-04-12 | 1947-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-11 | 1951-04-12 | 1951-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-11 | 1955-04-12 | 1955-10-12 | $7700.00 | Window Closed / Lapsed |