Patent US2648418A successfully refreshed from Google Patents.
US2648418A
Expired / Lapsed
US
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Variable escapement for typewriters
Assignee: Unisys Corp
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Filing: 1949-05-03
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Granted: 1953-08-11
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Expires: 1969-05-03
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Schremp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:15
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/34; B41J19/58; B41J19/14
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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |