Patent US2861543A successfully refreshed from Google Patents.
US2861543A
Expired / Lapsed
US
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Apparatus for development of electrostatic image
Assignee: Xerox Corp
•
Filing: 1954-06-14
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Granted: 1958-11-25
•
Expires: 1974-06-14
Abstract
No abstract record available.
Inventors
- 👤 Herbert E Crumrine
- 👤 Joseph F Rosenthal
- 👤 William E Bixby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:48
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0803
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2093995A
Cited
US1333079A
Cited
US1566800A
Cited
US2028796A
Cited
US2191827A
Cited
US2120003A
Cited
US2221776A
Cited
US2280240A
Cited
US2297691A
Cited
US2324787A
Cited
US2339899A
Cited
US2419835A
Cited
US2360627A
Cited
US2375766A
Cited
US2551582A
Cited
US2470580A
Cited
US2499466A
Cited
US2518811A
Cited
US2614528A
Cited
US2597323A
Cited
US2645529A
Cited
GB698994A
Cited
US2711481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |