Patent US2224764A successfully refreshed from Google Patents.
US2224764A
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US
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Data reproducing machine
Assignee: International Business Machines Corp
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Filing: 1939-06-16
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Granted: 1940-12-10
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Expires: 1959-06-16
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Dickinson
- 👤 Robert I Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:37
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/02; B26F1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-12-10 | 1944-06-10 | 1944-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-10 | 1948-06-10 | 1948-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-10 | 1952-06-10 | 1952-12-10 | $7700.00 | Window Closed / Lapsed |