Patent US2807233A successfully refreshed from Google Patents.
US2807233A
Expired / Lapsed
US
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Electrophotographic printing machine
Assignee: International Business Machines Corp
•
Filing: 1954-03-29
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Granted: 1957-09-24
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Expires: 1974-03-29
Abstract
No abstract record available.
Inventors
- 👤 Clyde J Fitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:55
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30; G03G15/14; G03G15/16; G03G15/1665; G03G15/167; G06; G06K; G06K1/00; G06K1/14; G06K1/18; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US615107A
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US1673958A
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US2357809A
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US2633796A
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US2624652A
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US2573881A
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US2641997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |