Patent US2809737A successfully refreshed from Google Patents.
US2809737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing and spacing mechanism for typewriters writing continuously in opposite directions
Assignee: Individual
•
Filing: 1955-12-13
•
Granted: 1957-10-15
•
Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Zint George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:55
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/14; B41J19/142
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2449126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |