Patent US2647519A successfully refreshed from Google Patents.
US2647519A
Expired / Lapsed
US
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Selector device for card indexes
Assignee: Individual
•
Filing: 1949-09-02
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Granted: 1953-08-04
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Expires: 1969-09-02
Abstract
No abstract record available.
Inventors
- 👤 Broxten Rudolf Brinkmann To
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:05
CPC Classifications
G; G06; G06K; G06K21/00; G06K21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE345783C
Cited
US1404611A
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FR19565E
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US1186470A
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US1251502A
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US1361494A
Cited
US1889635A
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US2217744A
Cited
US2331175A
Cited
US2379943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |