US2803714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple pole electrical typewriter key
Assignee: Individual
•
Filing: 1954-06-16
•
Granted: 1957-08-20
•
Expires: 1974-06-16
Abstract
No abstract record available.
Inventors
- 👤 Frank H Hesh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:02
CPC Classifications
B; B41; B41J; B41J7/00; B41J7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1434217A
Cited
US1572314A
Cited
US1840853A
Cited
US1954272A
Cited
US1912623A
Cited
US2532228A
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 |