US2877450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transfer system
Assignee: International Business Machines Corp
•
Filing: 1953-12-21
•
Granted: 1959-03-10
•
Expires: 1973-12-21
Abstract
No abstract record available.
Inventors
- 👤 Francis E Hamilton
- 👤 James J Troy
- 👤 Jr Ernest S Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:59
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/06; G06F3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2540654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |