US1686815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of testing magnetizable objects
Assignee: Magnetic Analysis Corp
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Filing: 1925-05-26
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Granted: 1928-10-09
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Expires: 1945-05-26
Abstract
No abstract record available.
Inventors
- 👤 Elmer S Imes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:36
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/80
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) | 1931-10-09 | 1932-04-09 | 1932-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-09 | 1936-04-09 | 1936-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-09 | 1940-04-09 | 1940-10-09 | $7700.00 | Window Closed / Lapsed |