US2550133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bookkeeping machine
Assignee: —
•
Filing: —
•
Granted: 1951-04-24
•
Expires: 1968-04-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:37
CPC Classifications
G; G06; G06C; G06C7/00; G06C7/10; G06C15/00; G06C15/04; G06C15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1414978A
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US1761684A
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US1637080A
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US1963346A
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US2132411A
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US2131503A
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US2244231A
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US2254931A
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US2367395A
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US2357455A
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US2369430A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |