Patent US2558309A successfully refreshed from Google Patents.
US2558309A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1948-11-23
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Granted: 1951-06-26
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Expires: 1968-11-23
Abstract
No abstract record available.
Inventors
- 👤 Frank P Mitten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:06
CPC Classifications
G; G09; G09F; G09F7/00; G09F7/02; G09F7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR407028A
Cited
US539957A
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FR17733E
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US1349670A
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US1820964A
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US2083484A
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US2091973A
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US2196258A
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US2337036A
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US2383024A
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US2368327A
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US2406124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |