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US2813986A
Expired / Lapsed
US
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Accounting machine systems
Assignee: International Business Machines Corp
•
Filing: 1953-04-29
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Granted: 1957-11-19
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Expires: 1973-04-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Dickinson
- 👤 Robert I Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:14
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/02; H01R13/10; H01R13/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1060939A
Cited
US2377764A
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US2377762A
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US2502960A
Cited
US2613287A
Cited
US2590950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |