Patent US2838174A successfully refreshed from Google Patents.
US2838174A
Expired / Lapsed
US
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Record sorting machines
Assignee: Unisys Corp
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Filing: 1952-05-08
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Granted: 1958-06-10
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Expires: 1972-05-08
Abstract
No abstract record available.
Inventors
- 👤 Frank A Lopez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:17
CPC Classifications
G; G06; G06K; G06K13/00; G06K13/02; G06K13/08; G06K13/14; A; A63; A63F; A63F1/00; A63F1/06; A63F1/12; A63F1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1716677A
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US1745388A
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US1799186A
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US1930266A
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US2209414A
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US2492664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |