US3009639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical calculation circuit
Assignee: El Re Ma S A Per Lo Sfruttamen
•
Filing: 1954-07-22
•
Granted: 1961-11-21
•
Expires: 1974-07-22
Abstract
No abstract record available.
Inventors
- 👤 Hoppe Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:03
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/40; G06F7/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2386763A
Cited
US2601281A
Cited
US2364540A
Cited
US2486809A
Cited
US2679977A
Cited
US2699290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |