US2611539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Short-cut multiplying machine
Assignee: —
•
Filing: —
•
Granted: 1952-09-23
•
Expires: 1969-09-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:39
CPC Classifications
G; G06; G06C; G06C15/00; G06C15/08; G06C15/20; G06C7/00; G06C7/02; G06C7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1973437A
Cited
GB437743A
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US1580858A
Cited
US1793155A
Cited
US1922971A
Cited
US1968201A
Cited
GB509747A
Cited
US2309240A
Cited
US2374333A
Cited
US2379877A
Cited
US2397745A
Cited
US2398286A
Cited
CH208976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |