US3615486A
Expired / Lapsed
US
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Physicochemical recording method
Assignee: Agfa Gevaert NV
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Filing: 1969-11-03
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Granted: 1971-10-26
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Expires: 1989-11-03
Abstract
Abstract A process is described for recording and reproducing information comprising the steps of imagewise exposing a recording layer comprising a polymeric composition which is photochemically hardenable to actinic light and contacting the exposed layer to a fluid medium containing a solvent and a nonsolvent for the polymeric composition for a period sufficient to mat the unhardened area of the recording layer without removing any substantial part of the polymeric composition. The resultant recording layer can be used in a manner similar to conventional photoresists, printing plates, and the like.
Inventors
- 👤 Gerard Albert Delzenne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:04
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/008; G03F7/012; G03F7/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
44 words
The process according to claim 1 wherein said solvent mixture will dissolve at least 5 parts by weight of the polymeric composition per 100 parts of solvent mixture at the temperature at which the recording layer is contacted with said liquid or vapor mixture.
Claim 2
Dependent Claim
33 words
The process of claim 1 wherein the liquid or vapor mixture includes a finely divided substance which is substantially insoluble in the polymeric composition and is soluble in said liquid or vapor mixture.
Claim 3
Dependent Claim
25 words
The process according to claim 1 wherein the said mixture contains a solvent, the vapor pressure of which is higher than that of the nonsolvent.
Claim 4
Dependent Claim
22 words
The process according to claim 1 wherein the recording layer or sheet contains a sensitizer or photoinitiator for the photochemically hardenable polymer.
Claim 5
Dependent Claim
14 words
The process according to claim 1 wherein Michler''s ketone is used as a sensitizer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |