Patent US2939016A successfully refreshed from Google Patents.
US2939016A
Expired / Lapsed
US
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Detecting apparatus
Assignee: International Business Machines Corp
•
Filing: 1956-11-20
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Granted: 1960-05-31
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Expires: 1976-11-20
Abstract
No abstract record available.
Inventors
- 👤 Maxwell R Cannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:16
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; G01N21/8901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1963185A
Cited
US2246906A
Cited
US2341934A
Cited
US2438588A
Cited
US2563213A
Cited
US2758712A
Cited
US2762930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |