Patent US2840217A successfully refreshed from Google Patents.
US2840217A
Expired / Lapsed
US
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Dual sheet feed mechanism
Assignee: Unisys Corp
•
Filing: 1953-12-24
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Granted: 1958-06-24
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Expires: 1973-12-24
Abstract
No abstract record available.
Inventors
- 👤 Nelson Arthur
- 👤 William R Schwolow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:38
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/48; B41J11/50; B41J11/51; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2237466A
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US2326291A
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US2392838A
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US2348059A
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US2436746A
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US2566932A
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US2555732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |