Patent US2683671A successfully refreshed from Google Patents.
Patent US2777418A successfully refreshed from Google Patents.
US2777418A
Expired / Lapsed
US
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Apparatus for developing a powder image on a xerographic plate
Assignee: Xerox Corp
•
Filing: 1954-02-08
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Granted: 1957-01-15
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Expires: 1974-02-08
Abstract
No abstract record available.
Inventors
- 👤 Robert W Gundlach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:28
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0801
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2381455A
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US2551582A
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US2633796A
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US2725304A
Cited
GB698994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |