Patent US3100426A successfully refreshed from Google Patents.
US3100426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic printers
Assignee: Individual
•
Filing: 1960-04-26
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Granted: 1963-08-13
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Expires: 1980-04-26
Abstract
No abstract record available.
Inventors
- 👤 Edward K Kaprelian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:23
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10S430/00; Y10S430/001; Y10S430/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A DEVICE FOR PRODUCING COLOR ELECTROPHOTOGRAPHS COMPRISING A FIRST NON-PHOTOCONDUCTIVE ELECTRODE TRANSPARENT TO THE COLORS OF THE VISIBLE SPECTRUM, A SECOND NONPHOTOCONDUCTIVE ELECTRODE PARALLEL TO, SPACED APART FROM AND COEXTENSIVE WITH SAID FIRST ELECTRODE, SAID SECOND ELECTRODE BEING PROVIDED WITH PERFORATIONS OVER ITS ENTIRE EXTENT AND BEING ELECTRICALLY INSULATED FROM SAID FIRST ELECTRODE, SAID TWO ELECTRODES FORMING THEREBETWEEN A DEVELOPMENT CHAMBER, A DEVELOPER HOUSING TERMINATING AT THE FACE OF SAID SECOND ELECTRODE OPPOSITE FROM THAT ADJACENT SAID FIRST ELECTRODE, MEANS FOR PROJECTING THROUGH SAID FIRST ELECTRODE AND INTO THE SPACE BETWEEN SAID FIRST ELECTRODE AND SAID SECOND ELECTRODE A COLORED LIGHT-IMAGE, MEANS FOR ESTABLISHING A POTENTIAL DIFFERENCE BETWEEN SAID FIRST AND SECOND ELECTRODE, MOTION IMPARTING MEANS WITHIN SAID DEVELOPER HOUSING FOR PASSING FLUID SUSPENDED PHOTOCONDUCTIVE DEVELOPER PARTICLES THROUGH SAID SECOND ELECTRODE INTO SAID DEVELOPMENT CHAMBER, WHEREBY SELECTED DEVELOPER PARTICLES MIGRATE ONTO THE SURFACE OF SAID FIRST ELECTRODE TO FORM THEREON A PATTERN CORRESPONDING TO THE PROJECTED IMAGE, A WEB OF BLACK COLORED IMAGE RECEIVING MATERIAL AND MEANS FOR TRANSFERRING SAID PATTERN OF PARTICLES TO SAID RECEIVING MATERIAL.
Claim 2
Independent Claim
177 words
A DEVICE FOR PRODUCING COLOR ELECTROPHOTOGRAPHS COMPRISING A FIRST NON-PHOTOCONDUCTIVE ELECTRODE TRANSPARENT TO THE COLORS OF THE VISIBLE SPECTRUM, A SECOND NONPHOTOCONDUCTIVE ELECTRODE PARALLEL TO, SPACED APART FROM AND COEXTENSIVE WITH SAID FIRST ELECTRODE, SAID SECOND ELECTRODE BEING PROVIDED WITH PERFORATIONS OVER ITS ENTIRE EXTENT AND BEING ELECTRICALLY INSULATED FROM SAID FIRST ELECTRODE, SAID TWO ELECTRODES FORMING THEREBETWEEN A DEVELOPMENT CHAMBER, A DEVELOPER HOUSING TERMINATING AT THE FACE OF SAID SECOND ELECTRODE OPPOSITE FROM THAT ADJACENT SAID FIRST ELECTRODE, MEANS FOR PROJECTING THROUGH SAID FIRST ELECTRODE AND INTO THE SPACE BETWEEN SAID FIRST ELECTRODE AND SAID SECOND ELECTRODE A COLORED LIGHT-IMAGE, MEANS FOR ESTABLISHING A POTENTIAL DIFFERENCE BETWEEN SAID FIRST AND SECOND ELECTRODE, MOTION IMPARTING MEANS WITHIN SAID DEVELOPER HOUSING FOR PASSING FLUID SUSPENDED PHOTOCONDUCTIVE DEVELOPER PARTICLES THROUGH SAID SECOND ELECTRODE INTO SAID DEVELOPMENT CHAMBER, WHEREBY SELECTED DEVELOPER PARTICLES MIGRATE ONTO THE SURFACE OF SAID FIRST ELECTRODE TO FORM THEREON A PATTERN CORRESPONDING TO THE PROJECTED IMAGE, A WEB OF BLACK COLORED IMAGE RECEIVING MATERIAL AND MEANS FOR TRANSFERRING SAID PATTERN OF PARTICLES TO SAID RECEIVING MATERIAL.
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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) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |