Patent US3281252A successfully refreshed from Google Patents.
US3489082A
Expired / Lapsed
US
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Electrostatically assisted ink transfer
Assignee: Crosfield Electronics Ltd
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Filing: 1967-11-20
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Granted: 1970-01-13
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Expires: 1987-11-20
Abstract
No abstract record available.
Inventors
- 👤 Kenneth B Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:45
CPC Classifications
B; B41; B41M; B41M1/00; B41M1/42; B41F; B41F9/00; B41F9/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2408144A
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US2520504A
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US2558900A
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US2558901A
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US2590321A
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US2691343A
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US3295441A
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US3339484A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |