US2919640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing device and flat stackable elements
Assignee: Individual
•
Filing: 1957-02-14
•
Granted: 1960-01-05
•
Expires: 1977-02-14
Abstract
No abstract record available.
Inventors
- 👤 Ritzerfeld Wilhelm
- 👤 Ritzerfeld Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:43
CPC Classifications
B; B41; B41L; B41L11/00; B41P; B41P2700/00; B41P2700/10; B41P2700/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1448197A
Cited
US1547289A
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US1666172A
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US2054344A
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US2425323A
Cited
US2572450A
Cited
US2622526A
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US2766685A
Cited
US2771838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |