US3146687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing apparatus
Assignee: International Business Machines Corp
•
Filing: 1960-12-05
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Granted: 1964-09-01
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Expires: 1980-12-05
Abstract
No abstract record available.
Inventors
- 👤 Claris L Donelson
- 👤 Betts Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:15
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0047; G03G15/00; G03G15/06; G03G15/08; G03G15/0801; G03G2221/00; G03G2221/0005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
APPARATUS FOR DEVELOPING AN ELECTROSTATIC CHARGE DISTRIBUTION PATTERN COMPRISING A ROTATABLE TABLE HAVING A FLAT PLANAR PHOTOCONDUCTIVE INSULATING SURFACE THEREON, MEANS FOR APPLYING A SUBSTANTIALLY UNIFORM ELECTROSTATIC CHARGE TO A RADIALLY EXTENDING PORTION OF SAID SURFACE, SAID SURFACE BEING ARRANGED TO RECEIVE A RADIANT ENERGY PATTERN ONTO SAID PORTION TO EFFECTIVELY DISCHARGE AREAS OF SAID UNIFORM CHARGE THEREBY PROVIDING AN ELECTROSTATIC CHARGE DISTRIBUTION PATTERN IN SAID PORTION ACCORDING TO SAID RADIANT ENERGY PATTERN, A RIM ENCLOSING SAID TABLE AND ARRANGED TO RETAIN ON SAID SURFACE A QUANTITY OF FINELY DIVIDED TONER PARTICLES AND CARRIER BEADS, SAID SURFACE BEING DISPOSED AT AN ANGLE TO THE HORIZONTAL SUFFICIENTLY ACUTE TO ACCUMULATE SAID BEADS AND PARTICLES AT THE LOWERMOST REGION OF SAID SURFACE, MOTIVE MEANS CONNECTED TO MOVE SAID PORTION SUBSTANTIALLY IN THE PLANE OF SAID SURFACE AND THROUGH SAID ACCUMULATION PRIOR AND SUBSEQUENT TO RECEIVING SAID RADIANT ENERGY PATTERN ONTO SAID PORTION AND MEANS SELECTIVELY OPERABLE TO FLOOD SAID PORTION WITH RADIANT ENERGY.
Claim 2
Dependent Claim
161 words
APPARATUS FOR DEVELOPING AN ELECTROSTATIC CHARGE DISTRIBUTION PATTERN COMPRISING A ROTATABLE TABLE HAVING A FLAT PLANAR PHOTOCONDUCTIVE INSULATING SURFACE THEREON, MEANS FOR APPLYING A SUBSTANTIALLY UNIFORM ELECTROSTATIC CHARGE TO A RADIALLY EXTENDING PORTION OF SAID SURFACE, SAID SURFACE BEING ARRANGED TO RECEIVE A RADIANT ENERGY PATTERN ONTO SAID PORTION TO EFFECTIVELY DISCHARGE AREAS OF SAID UNIFORM CHARGE THEREBY PROVIDING AN ELECTROSTATIC CHARGE DISTRIBUTION PATTERN IN SAID PORTION ACCORDING TO SAID RADIANT ENERGY PATTERN, A RIM ENCLOSING SAID TABLE AND ARRANGED TO RETAIN ON SAID SURFACE A QUANTITY OF FINELY DIVIDED TONER PARTICLES AND CARRIER BEADS, SAID SURFACE BEING DISPOSED AT AN ANGLE TO THE HORIZONTAL SUFFICIENTLY ACUTE TO ACCUMULATE SAID BEADS AND PARTICLES AT THE LOWERMOST REGION OF SAID SURFACE, MOTIVE MEANS CONNECTED TO MOVE SAID PORTION SUBSTANTIALLY IN THE PLANE OF SAID SURFACE AND THROUGH SAID ACCUMULATION PRIOR AND SUBSEQUENT TO RECEIVING SAID RADIANT ENERGY PATTERN ONTO SAID PORTION AND MEANS SELECTIVELY OPERABLE TO FLOOD SAID PORTION WITH RADIANT ENERGY.
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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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |