US4429027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoimaging process
Assignee: EIDP Inc
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Filing: 1981-05-21
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Granted: 1984-01-31
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Expires: 2001-05-21
Abstract
Abstract A simplified method for photoimaging a photosensitive layer produces in situ a radiation-opaque photomask on the photosensitive layer or on a cover sheet of the layer. A nonvisible latent image is toned and the toner is transferred to a layer or cover sheet to form an actinic radiation-opaque photomask.
Inventors
- 👤 Vaughan C. Chambers, Jr.
- 👤 Joseph E. Gervay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:06
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/20; G03F7/2002; G03F7/2014; G03F7/2016; G03F7/2018; G03F3/00; G03F3/10; G03F3/103; G03G; G03G13/00; G03G7/00; H; H05; H05K; H05K3/00; H05K3/0073; H05K3/0082; H05K2203/00; H05K2203/05; H05K2203/0502; H05K2203/0517; H05K2203/0548; H05K2203/0551; H05K3/02; H05K3/06; H05K3/061; H05K3/065; H05K3/10; H05K3/12; H05K3/1266
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
55 words
A process for photoimaging a photosensitive layer comprising the steps: (a) forming in situ an actinic radiation-opaque image on a transparent cover sheet which is on the photosensitive layer; (b) exposing the image-bearing layer to actinic radiation by which the layer is photoimaged; (c) removing the cover sheet; and (d) developing or fixing the photoimage.
Claim 2
Dependent Claim
55 words
A process for photoimaging a photosensitive layer comprising the steps: (a) forming in situ an actinic radiation-opaque image on a transparent cover sheet which is on the photosensitive layer; (b) exposing the image-bearing layer to actinic radiation by which the layer is photoimaged; (c) removing the cover sheet; and (d) developing or fixing the photoimage.
Claim 3
Dependent Claim
53 words
The process of claim 1 in which the image is formed by transfer onto the cover sheet by (i) forming a latent image on a magnetic or electrostatic recording surface; (ii) toning the recording surface with opaque toner to form a toner image; and (iii) transferring the toned image to the cover sheet.
Claim 4
Dependent Claim
16 words
The process of claim 1 in which the photosensitive layer is supported on a polymeric film.
Claim 5
Dependent Claim
16 words
The process of claim 2 in which the latent image is derived from an electronic signal.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein the image is formed using magnetic toner.
References Cited (Backward Citations)
US2956875A
Cited
US3576624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |