US2528450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power regulating means for typewriters
Assignee: International Business Machines Corp
•
Filing: 1946-12-13
•
Granted: 1950-10-31
•
Expires: 1966-12-13
Abstract
No abstract record available.
Inventors
- 👤 John L Petz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:41
CPC Classifications
B; B41; B41J; B41J7/00; B41J7/92; B41J7/94
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1227846A
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US1428851A
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US1643057A
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US1661710A
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US1828755A
Cited
US1924140A
Cited
US2217179A
Cited
US2393276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |