Patent US2861739A successfully refreshed from Google Patents.
US2861739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
perforated record making adding machine
Assignee: —
•
Filing: —
•
Granted: 1958-11-25
•
Expires: 1975-11-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:39
CPC Classifications
G; G06; G06C; G06C11/00; G06C11/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2688439A
Cited
US1834561A
Cited
US2285353A
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US2084445A
Cited
US2146283A
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US2240667A
Cited
US2240549A
Cited
US2364207A
Cited
US2493709A
Cited
US2568535A
Cited
US2702879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |