Patent US2936883A successfully refreshed from Google Patents.
US2936883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ribbon spool for calculating machines, etc.
Assignee: Individual
•
Filing: 1956-09-18
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Granted: 1960-05-17
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Expires: 1976-09-18
Abstract
No abstract record available.
Inventors
- 👤 Eichacker Harold Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:21
CPC Classifications
B; B41; B41J; B41J33/00; B41J33/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US415423A
Cited
US838373A
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US1793198A
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US2137745A
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US2239222A
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US2262874A
Cited
US2589192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |