Patent US5780561A successfully refreshed from Google Patents.
US2587631A
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Apparatus for measuring and detecting magnetic objects
Assignee: Primerica Inc
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Filing: 1948-05-21
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Granted: 1952-03-04
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Expires: 1968-05-21
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Kuehne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:09
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/06; G01B7/10; G01B7/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1946924A
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US1957222A
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US1983388A
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US2071607A
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US2222221A
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US2228294A
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US2349992A
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US2331418A
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US2312357A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |