Patent US1788870A successfully refreshed from Google Patents.
US2597306A
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Printing process wherein an alkaline substance passing through stencil openings effects coupling of an azo dye in situ
Assignee: Arthur D Little Inc
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Filing: 1949-10-05
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Granted: 1952-05-20
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Expires: 1969-10-05
Abstract
No abstract record available.
Inventors
- 👤 Eaton Samuel Edward
- 👤 Robert W Fabian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:44
CPC Classifications
B; B41; B41M; B41M1/00; B41M1/12; Y; Y10; Y10S; Y10S101/00; Y10S101/29; Y10S8/00; Y10S8/916; Y10S8/918; Y10S8/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS OF PRINTING WHICH COMPRISES APPLYING TO A SUPPORT A DIAZO COMPOUUD CAPABLE OF YIELDING A DYE WHEN COUPLED, AND A COUPLER FOR THE DIAZO COMPOUND THE REACTION OF SAID COMPOUNDS BEING INHIBITED BY ACID, AND AN ACID, SAID ACID BEING PRESENT IN AN AMOUNT AT LEAST SUFFICIENT TO PREVENT IMMEDIATE COUPLING OF THE DIAZO COMPOUND, EXPOSING THE SUPPORT THROUGH A STENCIL TO SUFFICIENT ALKALI TO CAUSE COUPLING OF ALKALIZED DIAZO COMPONENT AND SAID COUPLER, AND FIXING THE UNCOUPLED COMPOUND.
Claim 2
Dependent Claim
81 words
A PROCESS OF PRINTING WHICH COMPRISES APPLYING TO A SUPPORT A DIAZO COMPOUUD CAPABLE OF YIELDING A DYE WHEN COUPLED, AND A COUPLER FOR THE DIAZO COMPOUND THE REACTION OF SAID COMPOUNDS BEING INHIBITED BY ACID, AND AN ACID, SAID ACID BEING PRESENT IN AN AMOUNT AT LEAST SUFFICIENT TO PREVENT IMMEDIATE COUPLING OF THE DIAZO COMPOUND, EXPOSING THE SUPPORT THROUGH A STENCIL TO SUFFICIENT ALKALI TO CAUSE COUPLING OF ALKALIZED DIAZO COMPONENT AND SAID COUPLER, AND FIXING THE UNCOUPLED COMPOUND.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |