US2800539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Program device
Assignee: International Business Machines Corp
•
Filing: 1954-12-06
•
Granted: 1957-07-23
•
Expires: 1974-12-06
Abstract
No abstract record available.
Inventors
- 👤 Robert E Edminster
- 👤 Jr Jay C Shaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:50
CPC Classifications
B; B41; B41J; B41J3/00; B41J3/44; B41J3/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2540029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |