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US2639518A
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Assignee: Individual
•
Filing: 1950-08-21
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Granted: 1953-05-26
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Expires: 1970-08-21
Abstract
No abstract record available.
Inventors
- 👤 John C Vida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:07
CPC Classifications
G; G09; G09F; G09F19/00; G09F19/02; G09F19/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1311860A
Cited
US1076658A
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US1371733A
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US1431058A
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US1551809A
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US2116250A
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US2094705A
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US2569435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |