Patent US2563722A successfully refreshed from Google Patents.
US2563722A
Expired / Lapsed
US
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Power-driven mechanism for operating escapement and other instrumentalities of typewriters or like machines
Assignee: Royal Typewriter Co Inc
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Filing: 1949-06-13
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Granted: 1951-08-07
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Expires: 1969-06-13
Abstract
No abstract record available.
Inventors
- 👤 Henry J Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:26
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US897269A
Cited
US1614475A
Cited
US1737439A
Cited
US1712514A
Cited
US1900690A
Cited
US2008384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |