US2575866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calculating machine
Assignee: —
•
Filing: —
•
Granted: 1951-11-20
•
Expires: 1968-11-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:58
CPC Classifications
G; G06; G06C; G06C23/00; G06C23/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1338274A
Cited
US1398068A
Cited
US1482372A
Cited
US1508762A
Cited
US1518173A
Cited
US2383731A
Cited
FR382738A
Cited
US1287559A
Cited
US1120138A
Cited
US1101128A
Cited
US1260061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |