US2759450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic developing apparatus
Assignee: Xerox Corp
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Filing: 1955-10-26
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Granted: 1956-08-21
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Expires: 1975-10-26
Abstract
No abstract record available.
Inventors
- 👤 Robert G Vyverberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:38
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0803
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A XEROGRAPHIC DEVELOPING APPARATUS COMPRISING A DEVELOPING POWDER AGITATOR AND A DEVELOPING POWDER IMPELLER ARRANGED FOR ROTATION ABOUT A COMMON AXIS, MOTIVE MEANS FOR ROTATING SAID AGITATOR AND SAID IMPELLER, A POWDER CLOUD CHAMBER ENCLOSING SAID AGITATOR AND SAID IMPELLER, SAID CHAMBER HAVING UPWARDLY DIVERGENT SIDE WALLS, AND A XEROGRAPHIC PLATE SUPPORTING MEANS MOUNTED ON SAID CHAMBER.
Claim 2
Dependent Claim
57 words
A XEROGRAPHIC DEVELOPING APPARATUS COMPRISING A DEVELOPING POWDER AGITATOR AND A DEVELOPING POWDER IMPELLER ARRANGED FOR ROTATION ABOUT A COMMON AXIS, MOTIVE MEANS FOR ROTATING SAID AGITATOR AND SAID IMPELLER, A POWDER CLOUD CHAMBER ENCLOSING SAID AGITATOR AND SAID IMPELLER, SAID CHAMBER HAVING UPWARDLY DIVERGENT SIDE WALLS, AND A XEROGRAPHIC PLATE SUPPORTING MEANS MOUNTED ON SAID CHAMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |