Patent US3146100A successfully refreshed from Google Patents.
US3147147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic developing apparatus and electrode
Assignee: Xerox Corp
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Filing: 1961-06-05
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Granted: 1964-09-01
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Expires: 1981-06-05
Abstract
No abstract record available.
Inventors
- 👤 Chester F Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:10
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0801; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN AN ELECTROSTATIC IMAGE REPRODUCTION APPARATUS, INCLUDING A SURFACE FOR CARRYING AN ELECTROSTATIC LATENT IMAGE TO BE DEVELOPED WITH CASCADING DEVELOPER PARTICLES, A DEVELOPMENT ELECTRODE COMPRISING AN ARRAY OF PARALLEL PLATES SPACED APART A DISTANCE AT LEAST GREATER THAN THE LARGEST DIMENSION OF DEVELOPER PARTICLE TO BE CASCADED, SAID PLATES BEING ARRANGED EXTENDING SUBSTANTIALLY OUTWARDLY FROM THE PLANE OF THE IMAGE-BEARING SURFACE WITH ONE EDGE SET OF SAID PLATES SPACED FROM THE IMAGE-BEARING SURFACE A DISTANCE AT LEAST GREATER THAN THE LARGEST DIMENSION OF DEVELOPER PARTICLE TO BE CASCADED, SAID PLATE EDGES PRESENTING A SUBSTANTIALLY UNIFORM ELECTROSTATIC FIELD TO SAID IMAGE-BEARING SURFACE WHILE POSITIONED EXTENDING GENERALLY IN THE DIRECTION OF CASCADE MOVEMENT OF THE DEVELOPER PARTICLES AS TO ALLOW CASCADING PARTICLES TRAVERSING THE IMAGE-BEARING SURFACE TO PASS SUBSTANTIALLY UNIFORMLY UNIMPEDED UNDER AND BETWEEN SAID PLATES.
Claim 2
Dependent Claim
135 words
IN AN ELECTROSTATIC IMAGE REPRODUCTION APPARATUS, INCLUDING A SURFACE FOR CARRYING AN ELECTROSTATIC LATENT IMAGE TO BE DEVELOPED WITH CASCADING DEVELOPER PARTICLES, A DEVELOPMENT ELECTRODE COMPRISING AN ARRAY OF PARALLEL PLATES SPACED APART A DISTANCE AT LEAST GREATER THAN THE LARGEST DIMENSION OF DEVELOPER PARTICLE TO BE CASCADED, SAID PLATES BEING ARRANGED EXTENDING SUBSTANTIALLY OUTWARDLY FROM THE PLANE OF THE IMAGE-BEARING SURFACE WITH ONE EDGE SET OF SAID PLATES SPACED FROM THE IMAGE-BEARING SURFACE A DISTANCE AT LEAST GREATER THAN THE LARGEST DIMENSION OF DEVELOPER PARTICLE TO BE CASCADED, SAID PLATE EDGES PRESENTING A SUBSTANTIALLY UNIFORM ELECTROSTATIC FIELD TO SAID IMAGE-BEARING SURFACE WHILE POSITIONED EXTENDING GENERALLY IN THE DIRECTION OF CASCADE MOVEMENT OF THE DEVELOPER PARTICLES AS TO ALLOW CASCADING PARTICLES TRAVERSING THE IMAGE-BEARING SURFACE TO PASS SUBSTANTIALLY UNIFORMLY UNIMPEDED UNDER AND BETWEEN SAID PLATES.
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) | 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 |