US2506444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power mechanism for typewriting machines
Assignee: International Business Machines Corp
•
Filing: 1947-06-05
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Granted: 1950-05-02
•
Expires: 1967-06-05
Abstract
No abstract record available.
Inventors
- 👤 Ronald D Dodge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:35
CPC Classifications
B; B41; B41J; B41J7/00; B41J7/92; B41J7/94
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |