US2803329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Margin control for typewriters
Assignee: Unisys Corp
•
Filing: 1951-04-07
•
Granted: 1957-08-20
•
Expires: 1971-04-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Schremp
- 👤 William J Vickery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:45
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1130804A
Cited
US1134101A
Cited
US1594379A
Cited
US1748896A
Cited
US2209279A
Cited
US2316666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |