Patent US2032733A successfully refreshed from Google Patents.
Patent US3021059A successfully refreshed from Google Patents.
US3021059A
Expired / Lapsed
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Detection circuit for unwanted designations and blank columns
Assignee: International Business Machines Corp
•
Filing: 1957-06-10
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Granted: 1962-02-13
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Expires: 1977-06-10
Abstract
No abstract record available.
Inventors
- 👤 James P Hammer
- 👤 Jay W Slater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:26
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2275396A
Cited
US2646926A
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US2614632A
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US2598764A
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US2607015A
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US2758250A
Cited
US2869035A
Cited
US2861216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |