US2825814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic image formation
Assignee: Xerox Corp
•
Filing: 1954-06-04
•
Granted: 1958-03-04
•
Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Lewis E Walkup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:55
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/14; G03G15/18; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB188030A
Cited
US2221776A
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US2297691A
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US2277013A
Cited
US2357809A
Cited
US2666144A
Cited
US2693416A
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US2701764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |