US3178718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic recording
Assignee: Unisys Corp
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Filing: 1961-06-23
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Granted: 1965-04-13
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Expires: 1981-06-23
Abstract
No abstract record available.
Inventors
- 👤 Baron George M Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:02
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G15/325; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
ELECTROSTATIC RECORDING APPARATUS COMPRISING A FIRST ELECTRODE HAVING A FACE THEREOF SHAPED IN ACCORDANCE WITH AN ELECTROSTATIC CHARGE TO BE DEPOSITED ON A CHARGERETENTIVE RECORD MEDIUM; MEANS FOR FEEDING A CHARGERETENTIVE RECORD MEDIUM PAST SAID ELECTRODE FACE DEFINING A RECORDING ELECTRICAL DISCHARGE GAP THEREBETWEEN; MEANS FOR SUPPLYING DISCRETE VOLTAGE PULSES TO SAID FIRST ELECTRODE TO PRODUCE A DISCRETE ELECTROSTATIC DISCHARGE THEREFROM ONTO SAID RECORD MEDIUM SHAPED IN ACCORDANCE WITH THE FACE THEREOF; MEANS PROVIDING AN AUXILIARY ELECTRICAL DISCHARGE GAP IN THE VICINITY OF SAID RECORDING ELECTRICAL DISCHARGE GAP; SAID LATTER MEANS COMPRISING A SECOND ELECTRODE AND A THIRD ELECTRODE BOTH OF WHICH ARE SEPARATE AND DISTINCT FROM SAID FIRST ELECTRODE; AND MEANS FOR PRODUCING AN ELECTRICAL DISCHARGE BETWEEN SAID SECOND AND THIRD ELECTRODES AT THE TIME VOLTAGE PULSES ARE APPLIED TO SAID FIRST ELECTRODE; SAIDD SECOND AND THIRD ELECTRODES BEING SPACED FROM SAID FIRST ELECTRODE SUFFICIENTLY CLOSE TO PROMOTE AN ELECTRICAL DISCHARGE FROM SAID FIRST ELECTRODE ONTO SAID RECORD MEDIUM BUT BEING ORIENTED IN SHIELDED RELATION WITH RESPECT TO THE RECORD MEDIUM SO AS NOT TO PRODUCE ELECTROSTATIC DISCHARGES THEREFROM DIRECTLY ONTO THE RECORD MEDIUM.
Claim 2
Dependent Claim
185 words
ELECTROSTATIC RECORDING APPARATUS COMPRISING A FIRST ELECTRODE HAVING A FACE THEREOF SHAPED IN ACCORDANCE WITH AN ELECTROSTATIC CHARGE TO BE DEPOSITED ON A CHARGERETENTIVE RECORD MEDIUM; MEANS FOR FEEDING A CHARGERETENTIVE RECORD MEDIUM PAST SAID ELECTRODE FACE DEFINING A RECORDING ELECTRICAL DISCHARGE GAP THEREBETWEEN; MEANS FOR SUPPLYING DISCRETE VOLTAGE PULSES TO SAID FIRST ELECTRODE TO PRODUCE A DISCRETE ELECTROSTATIC DISCHARGE THEREFROM ONTO SAID RECORD MEDIUM SHAPED IN ACCORDANCE WITH THE FACE THEREOF; MEANS PROVIDING AN AUXILIARY ELECTRICAL DISCHARGE GAP IN THE VICINITY OF SAID RECORDING ELECTRICAL DISCHARGE GAP; SAID LATTER MEANS COMPRISING A SECOND ELECTRODE AND A THIRD ELECTRODE BOTH OF WHICH ARE SEPARATE AND DISTINCT FROM SAID FIRST ELECTRODE; AND MEANS FOR PRODUCING AN ELECTRICAL DISCHARGE BETWEEN SAID SECOND AND THIRD ELECTRODES AT THE TIME VOLTAGE PULSES ARE APPLIED TO SAID FIRST ELECTRODE; SAIDD SECOND AND THIRD ELECTRODES BEING SPACED FROM SAID FIRST ELECTRODE SUFFICIENTLY CLOSE TO PROMOTE AN ELECTRICAL DISCHARGE FROM SAID FIRST ELECTRODE ONTO SAID RECORD MEDIUM BUT BEING ORIENTED IN SHIELDED RELATION WITH RESPECT TO THE RECORD MEDIUM SO AS NOT TO PRODUCE ELECTROSTATIC DISCHARGES THEREFROM DIRECTLY ONTO THE RECORD MEDIUM.
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |