US2923452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perforating mechanism for record cards
Assignee: International Business Machines Corp
•
Filing: 1956-10-01
•
Granted: 1960-02-02
•
Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles Holovka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:06
CPC Classifications
G; G06; G06K; G06K19/00; Y; Y10; Y10T; Y10T225/00; Y10T225/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1959101A
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US2745492A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |