Patent US2667415A successfully refreshed from Google Patents.
US2667415A
Expired / Lapsed
US
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Process for producing positive photolithographic printing foils
Assignee: Azoplate Corp
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Filing: 1949-01-13
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Granted: 1954-01-26
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Expires: 1969-01-13
Abstract
No abstract record available.
Inventors
- 👤 Neugebauer Wilhelm
- 👤 Barthenheier Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:11
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE POSITIVE WORKING PROCESS FOR PRODUCING LITHOGRAPHIC PRINTING PLATES FROM LIGHT SENSITIVE MATERIAL HAVING A HYDROPHILIC SULFACE WHICH HAS BEEN PHOTO-SENSITIZED WITH A DIAZO COMPOUND OF HIGH MOLECULAR WEIGHT WHICH UPON DIRECT EXPOSURE TO LIGHT DECOMPOSES INTO A GREASY INK RECEPTIVE SUBSTANCE, SAID PROCESS COMPRISING THE STEPS OF APPLYING AN AQUEOUS COLLOIDAL SOLUTION OF WATER SOLUBLE ORGANIC COLLOID TO SAID SENSITIZED HYDROPHILIC SURFACE TO COVER SAID SENSITIZED SURFACE WITH A WATER SOLUBLE ORGANIC COLLOID LAYER, EXPOSING SAID SENSITIZED HYDROPHILIC SURFACE PROVIDED WITH SAID WATER SOLUBLE COLLOID LAYER TO A LIGHT IMAGE, REMOVING SAID WATER SOLUBLE SOLLOID LAYER AND COMPLETELY REEXPOSING SAID SENSITIZED HYDROPHILIC SURFACE TO LIGHT.
Claim 2
Dependent Claim
106 words
THE POSITIVE WORKING PROCESS FOR PRODUCING LITHOGRAPHIC PRINTING PLATES FROM LIGHT SENSITIVE MATERIAL HAVING A HYDROPHILIC SULFACE WHICH HAS BEEN PHOTO-SENSITIZED WITH A DIAZO COMPOUND OF HIGH MOLECULAR WEIGHT WHICH UPON DIRECT EXPOSURE TO LIGHT DECOMPOSES INTO A GREASY INK RECEPTIVE SUBSTANCE, SAID PROCESS COMPRISING THE STEPS OF APPLYING AN AQUEOUS COLLOIDAL SOLUTION OF WATER SOLUBLE ORGANIC COLLOID TO SAID SENSITIZED HYDROPHILIC SURFACE TO COVER SAID SENSITIZED SURFACE WITH A WATER SOLUBLE ORGANIC COLLOID LAYER, EXPOSING SAID SENSITIZED HYDROPHILIC SURFACE PROVIDED WITH SAID WATER SOLUBLE COLLOID LAYER TO A LIGHT IMAGE, REMOVING SAID WATER SOLUBLE SOLLOID LAYER AND COMPLETELY REEXPOSING SAID SENSITIZED HYDROPHILIC SURFACE TO LIGHT.
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) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |