US2531089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calculating machine
Assignee: —
•
Filing: —
•
Granted: 1950-11-21
•
Expires: 1967-11-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:18
CPC Classifications
G; G06; G06C; G06C7/00; G06C7/02; G06C7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1309536A
Cited
US1874719A
Cited
US2241102A
Cited
US2436668A
Cited
US628273A
Cited
US1208288A
Cited
US1297711A
Cited
US2104051A
Cited
US2311354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |