Patent US2491369A successfully refreshed from Google Patents.
US2491369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line printing device for duplicating machines
Assignee: Individual
•
Filing: 1945-07-31
•
Granted: 1949-12-13
•
Expires: 1965-07-31
Abstract
No abstract record available.
Inventors
- 👤 Ford Frank Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:10
CPC Classifications
B; B41; B41L; B41L11/00; B41P; B41P2700/00; B41P2700/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2034207A
Cited
US1837336A
Cited
DE654263C
Cited
GB421352A
Cited
US2130600A
Cited
US2054344A
Cited
US2262510A
Cited
US2236442A
Cited
US2399176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |