Patent US2742998A successfully refreshed from Google Patents.
US2742998A
Expired / Lapsed
US
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Improvements in typewriters, in types and in affiliated appliances
Assignee: Individual
•
Filing: 1949-12-05
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Granted: 1956-04-24
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Expires: 1969-12-05
Abstract
No abstract record available.
Inventors
- 👤 Szczepanowski Stanislaw Wiktor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:51
CPC Classifications
B; B41; B41J; B41J7/00; B41J7/90
Claims Analysis
Total Claims: 0
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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) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |