US2889234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic development process
Assignee: Xerox Corp
•
Filing: 1955-07-13
•
Granted: 1959-06-02
•
Expires: 1975-07-13
Abstract
No abstract record available.
Inventors
- 👤 James J Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:52
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)
US238991A
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US2618552A
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US2550724A
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US2550738A
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US2635046A
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US2682478A
Cited
US2705199A
Cited
US2761416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |