Patent US2941144A successfully refreshed from Google Patents.
US2941144A
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Conductive particle detector
Assignee: International Business Machines Corp
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Filing: 1957-12-30
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Granted: 1960-06-14
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Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Maxwell R Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:44
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/02; G01V3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1827349A
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US2220489A
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US2227050A
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US2653298A
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US2772394A
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US2803701A
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US2829340A
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US2873425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |