US2953231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic optical tabulating system
Assignee: International Business Machines Corp
•
Filing: 1959-04-24
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Granted: 1960-09-20
•
Expires: 1979-04-24
Abstract
No abstract record available.
Inventors
- 👤 William C Dersch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:03
CPC Classifications
B; B41; B41J; B41J25/00; B41J25/02; B41J25/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2111619A
Cited
US2860759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |