US2857271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printing process for producing photographic transparencies
Assignee: RCA Corp
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Filing: 1954-09-28
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Granted: 1958-10-21
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Expires: 1974-09-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Meyer L Sugarman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:21
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/26; G03G13/22; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/087; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
AN ELECTROSTATIC PRINTING PROCESS WHICH COMPRISES PROVIDING A SUBSTANTIALLY TRANSPARENT BACKING HAVING ON ONE SURFACE THEREOF A COATING OF A PHOTOCONDUCTIVE INSULATING MATERIAL COMPRISING A PHOTOCONDUCTOR DISPERSED IN AN ORGANIC, SUBSTANTIALLY TRANSPARENT, FILMFORMING BINDER, PRODUCING AN ELECTROSTATIC IMAGE ON THE SURFACE OF SAID PHOTOCONDUCTIVE INSULATING MATERIAL DEVELOPING SAID ELECTROSTATIC IMAGE WITH A FINELY-DIVIDED DEVELOPER SUBSTANCE, FIXING SAID FINELY-DIVIDED DESUBSTANCE SUBSTANTIALLY IN SITU, DISSOLVING SUBSTANTIALLY ALL OF SAID DISPERSED PHOTOCONDUCTOR FROM SAID PHOTOCONDUCTIVE INSULATING MATERIAL WITH A REAGENT WHICH IS A SOLVENT FOR SAID PHOTOCONDUCTOR BUT NOT FOR SAID BINDER SO AS TO RENDER THE REMAINDER OF SAID COATING SUBSTANTIALLY TRANSPARENT, SAID ORGANIC FILM-FORMING BINDER AND SAID FIXED DEVELOPER SUBSTANCE BEING SUBSTANTIALLY UNAFFECTED BY SAID REAGENT.
Claim 2
Dependent Claim
115 words
AN ELECTROSTATIC PRINTING PROCESS WHICH COMPRISES PROVIDING A SUBSTANTIALLY TRANSPARENT BACKING HAVING ON ONE SURFACE THEREOF A COATING OF A PHOTOCONDUCTIVE INSULATING MATERIAL COMPRISING A PHOTOCONDUCTOR DISPERSED IN AN ORGANIC, SUBSTANTIALLY TRANSPARENT, FILMFORMING BINDER, PRODUCING AN ELECTROSTATIC IMAGE ON THE SURFACE OF SAID PHOTOCONDUCTIVE INSULATING MATERIAL DEVELOPING SAID ELECTROSTATIC IMAGE WITH A FINELY-DIVIDED DEVELOPER SUBSTANCE, FIXING SAID FINELY-DIVIDED DESUBSTANCE SUBSTANTIALLY IN SITU, DISSOLVING SUBSTANTIALLY ALL OF SAID DISPERSED PHOTOCONDUCTOR FROM SAID PHOTOCONDUCTIVE INSULATING MATERIAL WITH A REAGENT WHICH IS A SOLVENT FOR SAID PHOTOCONDUCTOR BUT NOT FOR SAID BINDER SO AS TO RENDER THE REMAINDER OF SAID COATING SUBSTANTIALLY TRANSPARENT, SAID ORGANIC FILM-FORMING BINDER AND SAID FIXED DEVELOPER SUBSTANCE BEING SUBSTANTIALLY UNAFFECTED BY SAID REAGENT.
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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |