US2815913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic adding circuits
Assignee: Powers Samas Accounting Machines Ltd
•
Filing: 1954-09-24
•
Granted: 1957-12-10
•
Expires: 1974-09-24
Abstract
No abstract record available.
Inventors
- 👤 Lucas John Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/50; G06F7/501; G06F7/502
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2694521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |