Patent US3466259A successfully refreshed from Google Patents.
Patent US2911944A successfully refreshed from Google Patents.
US2911944A
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US
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Xerographic development apparatus
Assignee: Xerox Corp
•
Filing: 1954-09-16
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Granted: 1959-11-10
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Expires: 1974-09-16
Abstract
No abstract record available.
Inventors
- 👤 Richard E Hayford
- 👤 Herbert E Crumrine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:44
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0035; G03G15/00; G03G15/06; G03G15/08; G03G15/0803
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |