US2424772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for detecting magnetic masses
Assignee: INTERVAL INSTR Inc
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Filing: 1943-07-13
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Granted: 1947-07-29
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Expires: 1963-07-13
Abstract
No abstract record available.
Inventors
- 👤 Rieber Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:06
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/15; G01V3/165
Claims Analysis
Total Claims: 0
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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) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |