Patent US3217330A successfully refreshed from Google Patents.
US3217330A
Expired / Lapsed
US
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Electrostatic printing utilizing printthrough recording
Assignee: Xerox Corp
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Filing: 1960-08-29
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Granted: 1965-11-09
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Expires: 1980-08-29
Abstract
No abstract record available.
Inventors
- 👤 Fredercik A Schwertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:47
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/06; H01J31/065; G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF ELECTROSTATIC RECORDING IN AIR AT ATMOSPHERIC PRESSURE WHICH COMPRISES BRINGING AN ARRAY OF PIN-LIKE PRINT ELECTRODES INTO SUBSTANTIALLY UNIFORMLY CLOSELY SPACED RELATIONSHIP WITH A FACING CONDUCTIVE BACKING ELECTRODE, POSITIONING A RECORDING WEB COMPRISING A HIGHLY INSULATING SURFACE COATING ON A PAPER LAYER BETWEEN SAID PRINT ELECTRODE ARRAY AND SAID BACKING ELECTRODE WITH SAID PAPER LAYER IN PHYSICAL CONTACT AND FACING SAID PRINT ELECTRODE ARRAY AND WITH SAID INSULATING LAYER FACING AND SPACED BY A GAP OF BETWEEN ABOUT 3 TO 10 MILS FROM SAID BACKING ELECTRODE, AND PRODUCING AN ELECTRIC FIELD BETWEEN SELECTED PRINT ELECTRODES AND SAID BACKING ELECTRODE SUFFICIENT TO PRODUCE A FIELD DISCHARGE TO FORM AN ELECTROSTATIC CHARGE PATTERN ON SAID WEB CORRESPONDING TO THE PATTERN OF SAID SELECTED ELECTRODES.
Claim 2
Independent Claim
125 words
THE METHOD OF ELECTROSTATIC RECORDING IN AIR AT ATMOSPHERIC PRESSURE WHICH COMPRISES BRINGING AN ARRAY OF PIN-LIKE PRINT ELECTRODES INTO SUBSTANTIALLY UNIFORMLY CLOSELY SPACED RELATIONSHIP WITH A FACING CONDUCTIVE BACKING ELECTRODE, POSITIONING A RECORDING WEB COMPRISING A HIGHLY INSULATING SURFACE COATING ON A PAPER LAYER BETWEEN SAID PRINT ELECTRODE ARRAY AND SAID BACKING ELECTRODE WITH SAID PAPER LAYER IN PHYSICAL CONTACT AND FACING SAID PRINT ELECTRODE ARRAY AND WITH SAID INSULATING LAYER FACING AND SPACED BY A GAP OF BETWEEN ABOUT 3 TO 10 MILS FROM SAID BACKING ELECTRODE, AND PRODUCING AN ELECTRIC FIELD BETWEEN SELECTED PRINT ELECTRODES AND SAID BACKING ELECTRODE SUFFICIENT TO PRODUCE A FIELD DISCHARGE TO FORM AN ELECTROSTATIC CHARGE PATTERN ON SAID WEB CORRESPONDING TO THE PATTERN OF SAID SELECTED ELECTRODES.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |