US3124456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
figure
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:48
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/14708; G03G5/14713; G03G5/14717; G03G5/1473; G03G15/00; G03G15/22; G03G15/226; G03G15/26; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/10; G03G5/14721; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A METHOD OF ELECTROSTATIC PRINTING COMPRISING THE STEPS OF EXPOSING A PHOTOCONDUCTIVE INSULATING LAYER TO AN ELECTROMAGNETIC RADIATION IMAGE, SAID LAYER HAVING N INSULATING COATING ON AND INTEGRAL WITH ONE SURFACE THEREOF, THE VOLUME UNDER THE EXPOSED AREAS OF SAID LAYER COMBINING IN SERIES WITH THE VOLUME OF SAID COATING UNDER THE SAME SAID AREAS TO PROVIDE AT LEAST ONE ELECTRICAL NETWORK HAVING A PREDETERMINED TIME CONSTANT, EQUAL TO RL(C1+CP) WHEREIN: RL IS THE RESISTANCE OF THE VOLUME UNDER AN EXPOED AREA OF SAID LAYER, C1 IS THE CAPACITANCE OF THE VOLUME OF SAID COATING UNDER THE SAME SAID AREA AND CP IS THE CAPACITANCE OF THE VOLUME OF SAID LAYER UNDER THE SAME SAID AREA, C1 BEING SUBSTANTIALLY LARGER THAN CP, APPLYING AN ELECTRIC FIELD ACROSS SAID LAYER AND SAID COATING FOR A TIME ABOUT EQUAL TO ((RL)(RD)(CI+CP)LN(RD/RL))/RD-RL RD BEING THE RESISTANCE OF THE SAME VOLUME OF SAID LAYER WHEN UNEXPOSED AND HAVING A VALUE AT LEAST 10 TIMES THE VALUE OF RL, TO PROVIDE AN ELECTROSTATIC IMAGE ON SAID COATING, AND DEVELOPING SAID ELECTROSTATIC IMAGE BY APPLYING THERETO A FINELY-DIVIDED DEVELOPER SUBSTANCE.
Claim 2
Independent Claim
184 words
A METHOD OF ELECTROSTATIC PRINTING COMPRISING THE STEPS OF EXPOSING A PHOTOCONDUCTIVE INSULATING LAYER TO AN ELECTROMAGNETIC RADIATION IMAGE, SAID LAYER HAVING N INSULATING COATING ON AND INTEGRAL WITH ONE SURFACE THEREOF, THE VOLUME UNDER THE EXPOSED AREAS OF SAID LAYER COMBINING IN SERIES WITH THE VOLUME OF SAID COATING UNDER THE SAME SAID AREAS TO PROVIDE AT LEAST ONE ELECTRICAL NETWORK HAVING A PREDETERMINED TIME CONSTANT, EQUAL TO RL(C1+CP) WHEREIN: RL IS THE RESISTANCE OF THE VOLUME UNDER AN EXPOED AREA OF SAID LAYER, C1 IS THE CAPACITANCE OF THE VOLUME OF SAID COATING UNDER THE SAME SAID AREA AND CP IS THE CAPACITANCE OF THE VOLUME OF SAID LAYER UNDER THE SAME SAID AREA, C1 BEING SUBSTANTIALLY LARGER THAN CP, APPLYING AN ELECTRIC FIELD ACROSS SAID LAYER AND SAID COATING FOR A TIME ABOUT EQUAL TO ((RL)(RD)(CI+CP)LN(RD/RL))/RD-RL RD BEING THE RESISTANCE OF THE SAME VOLUME OF SAID LAYER WHEN UNEXPOSED AND HAVING A VALUE AT LEAST 10 TIMES THE VALUE OF RL, TO PROVIDE AN ELECTROSTATIC IMAGE ON SAID COATING, AND DEVELOPING SAID ELECTROSTATIC IMAGE BY APPLYING THERETO A FINELY-DIVIDED DEVELOPER SUBSTANCE.
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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) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |