US2946682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printing
Assignee: RCA Corp
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Filing: 1958-12-12
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Granted: 1960-07-26
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Expires: 1978-12-12
Abstract
No abstract record available.
Inventors
- 👤 John P Lauriello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:29
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A METHOD OF ELECTROSTATIC PRINTING UTILIZING A SUBSTRATE HAVING A VOLUME RESISTIVITY GREATER THAN 10**10 OHM-CM. AT ABOUT ROOM TEMPERATURE AND A VOLUME RESISTIVITY LESS THAN 10**10 OHM-CM. AT A TEMPERATURE SUBSTANTIALLY WITHIN A RANGE OF ABOUT 10*C. TO 300*C. AND HAVING ON ONE SURFACE THEREOF AN INSULATING PHOTOCONDUCTIVE COATING, SAID METHOD COMPRISING HEATING SAID SUBSTRATE TO AT LEAST SAID TEMPERATURE AT WHICH SAID VOLUME RESISTIVITY IS LESS THAN 10**10 OHM-CM., SUBSTANTIALLY IMMEDIATELY THEREAFTER SIMULTANEOUSLY CONTACTING AN ELECTRODE TO THE UNCOATED SIDE OF SAID SUBSTRATE AND APPLYING TO PRODUCE A SUBSTANTIALLY UNIFORM ELECTROSTATIC CHARGE TO PRODUCE A SUBSTANTIALLY UNIFORM ELECTROSTATIC CHARGE ON SAID COATING, DISCHARGING THE CHARGE ON SAID COATING IN SELECTED AREAS TO PRODUCE THEREON A LATENT ELECTROSTATIC IMAGE, AND DEVELOPING SAID ELECTROSTATIC IMALGE WITH AN ELECTROSCOPIC DEVELOPER SUBSTANCE TO PRODUCE A VISIBLE IMAGE ON SAID COATING.
Claim 2
Independent Claim
138 words
A METHOD OF ELECTROSTATIC PRINTING UTILIZING A SUBSTRATE HAVING A VOLUME RESISTIVITY GREATER THAN 10**10 OHM-CM. AT ABOUT ROOM TEMPERATURE AND A VOLUME RESISTIVITY LESS THAN 10**10 OHM-CM. AT A TEMPERATURE SUBSTANTIALLY WITHIN A RANGE OF ABOUT 10*C. TO 300*C. AND HAVING ON ONE SURFACE THEREOF AN INSULATING PHOTOCONDUCTIVE COATING, SAID METHOD COMPRISING HEATING SAID SUBSTRATE TO AT LEAST SAID TEMPERATURE AT WHICH SAID VOLUME RESISTIVITY IS LESS THAN 10**10 OHM-CM., SUBSTANTIALLY IMMEDIATELY THEREAFTER SIMULTANEOUSLY CONTACTING AN ELECTRODE TO THE UNCOATED SIDE OF SAID SUBSTRATE AND APPLYING TO PRODUCE A SUBSTANTIALLY UNIFORM ELECTROSTATIC CHARGE TO PRODUCE A SUBSTANTIALLY UNIFORM ELECTROSTATIC CHARGE ON SAID COATING, DISCHARGING THE CHARGE ON SAID COATING IN SELECTED AREAS TO PRODUCE THEREON A LATENT ELECTROSTATIC IMAGE, AND DEVELOPING SAID ELECTROSTATIC IMALGE WITH AN ELECTROSCOPIC DEVELOPER SUBSTANCE TO PRODUCE A VISIBLE IMAGE ON SAID COATING.
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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |