Patent US3237197A successfully refreshed from Google Patents.
US3237197A
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Image method for electrostatic retention in photoconductive layers
Assignee: Xerox Corp
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Filing: 1961-12-22
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Granted: 1966-02-22
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Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Lewis E Walkup
- 👤 John F Byrne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:03
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/221; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2277013A
Cited
US2793288A
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US2890968A
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US2962374A
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US2875054A
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US3040124A
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US2958737A
Cited
US3057275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |