US2601281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binary add-subtract device
Assignee: International Standard Electric Corp
•
Filing: 1943-07-12
•
Granted: 1952-06-24
•
Expires: 1963-07-12
Abstract
No abstract record available.
Inventors
- 👤 Hartley George Clifford
- 👤 Reynolds William John
- 👤 Haigh Leslie Baines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:18
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/40; G06F7/405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB410129A
Cited
US2191567A
Cited
US2318591A
Cited
US2192612A
Cited
US2375332A
Cited
US2386763A
Cited
US2364540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-24 | 1955-12-24 | 1956-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-24 | 1959-12-24 | 1960-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-24 | 1963-12-24 | 1964-06-24 | $7700.00 | Window Closed / Lapsed |