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Patent US3421612A successfully refreshed from Google Patents.
US3421612A
Expired / Lapsed
US
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Lister attachment for high speed web printers
Assignee: Unisys Corp
•
Filing: 1965-08-30
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Granted: 1969-01-14
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Expires: 1985-08-30
Abstract
No abstract record available.
Inventors
- 👤 Solomon Harold Pitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:57
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/48; B41J11/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2346163A
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GB567455A
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US2862596A
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US3006061A
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US3219043A
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US3176819A
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US3114491A
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US3154235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |