Patent US2939787A successfully refreshed from Google Patents.
US2939787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposure of photochemical compositions
Assignee: RCA Corp
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Filing: 1957-03-01
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Granted: 1960-06-07
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Expires: 1977-03-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward C Giaimo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:03
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/26; G03G13/32; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/095; G03F7/0952; G03G5/00; G03G5/14; G03G5/142; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS UTILIZING A PHOTOGRAPHIC ELEMENT COMPRISING A SUBSTRATE OF A PHOTOCHEMICAL PHOTOGRAPHICALLY SENSITIVE MATERIAL HAVING ADHERING TO ONE SURFACE THEREOF A PHOTOCONDUCTIVE INSULATING COATING OF A PARTICULATE PHOTOCONDUCTOR DISPERSED IN AN ELECTRICALLY INSULATING FILM-FORMED VEHICLE, SAID COATING BEING SUBSTANTIALLY TRANSLUCENT TO RADIATION OF A WAVELENGTH TO WHICH SAID PHOTOCHEMICAL MATERIAL IS SENSITIVE, SAID PROCESS COMPRISING THE STEPS OF: (1) ELECTROPHOTOGRAPHICALLY FORMING AN ELECTROSTATIC IMAGE ON SAID PHOTOCONDUCTING INSULATING COATING, (2) DEVELOPING SAID ELECTROSTIC IMAGE WITH DEVELOPER PARTICLES OPAQUE TO RADIATIONS OF SAID WAVELENGTH, AND, (3) EXPOSING SAID SUBSTRATE TO RADIATIONS OF SAID WAVELENGTH THROUGH SAID PHOTOCONDUCTIVE INSULATING LAYER TO PRODUCE IN SAID SUBSTRATE A PHOTOCHEMICAL IMAGE.
Claim 2
Dependent Claim
107 words
A PROCESS UTILIZING A PHOTOGRAPHIC ELEMENT COMPRISING A SUBSTRATE OF A PHOTOCHEMICAL PHOTOGRAPHICALLY SENSITIVE MATERIAL HAVING ADHERING TO ONE SURFACE THEREOF A PHOTOCONDUCTIVE INSULATING COATING OF A PARTICULATE PHOTOCONDUCTOR DISPERSED IN AN ELECTRICALLY INSULATING FILM-FORMED VEHICLE, SAID COATING BEING SUBSTANTIALLY TRANSLUCENT TO RADIATION OF A WAVELENGTH TO WHICH SAID PHOTOCHEMICAL MATERIAL IS SENSITIVE, SAID PROCESS COMPRISING THE STEPS OF: (1) ELECTROPHOTOGRAPHICALLY FORMING AN ELECTROSTATIC IMAGE ON SAID PHOTOCONDUCTING INSULATING COATING, (2) DEVELOPING SAID ELECTROSTIC IMAGE WITH DEVELOPER PARTICLES OPAQUE TO RADIATIONS OF SAID WAVELENGTH, AND, (3) EXPOSING SAID SUBSTRATE TO RADIATIONS OF SAID WAVELENGTH THROUGH SAID PHOTOCONDUCTIVE INSULATING LAYER TO PRODUCE IN SAID SUBSTRATE A PHOTOCHEMICAL IMAGE.
References Cited (Backward Citations)
US1303635A
Cited
US1564753A
Cited
US980290A
Cited
US1285015A
Cited
US1912693A
Cited
US2173741A
Cited
US2257143A
Cited
US2297691A
Cited
US2681473A
Cited
US2693416A
Cited
US2725296A
Cited
US2857271A
Cited
US2844543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |