US2318591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus calling for a material representation of numbers
Assignee: Individual
•
Filing: 1937-03-26
•
Granted: 1943-05-11
•
Expires: 1957-03-26
Abstract
No abstract record available.
Inventors
- 👤 Couffignal Pierre Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:49
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/46; G06F7/468; F; F15; F15B; F15B11/00; F15B11/08; G06F7/40; G06F7/405; H; H03; H03M; H03M1/00; H03M1/12; H03M1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-05-10 | 1946-11-09 | 1947-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-10 | 1950-11-09 | 1951-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-10 | 1954-11-09 | 1955-05-11 | $7700.00 | Window Closed / Lapsed |