US2994609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Development of diazotype printing plates
Assignee: Azoplate Corp
•
Filing: 1956-09-25
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Granted: 1961-08-01
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Expires: 1976-09-25
Abstract
No abstract record available.
Inventors
- 👤 Max A Landau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:56
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR DEVELOPING A PRINTING PLATE COMPRISING A BASE MATERIAL HAVING A COATING THEREON COMPRISING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF IMINOQUINONE DIAZIDES AND ESTERS AND AMIDES OF BENZOQUINONE DIAZIDES AND NAPHTHOQUIONE DIAZINES WHICH COMPRISES EXPOSING THE PLATE TO LIGHT UNDER A MASTER AND TREATING THE EXPOSED PLATE WITH A DEVELOPER CONSISTING ESSENTIALLY OF A WATER INSOLUBLE ORGANIC SOLVENT EMULSIFIED IN A DILUTE AQUEOUS SOLUTION OF PHOSPHORIC ACID AND GUM ARABIC, WHEREBY THOSE PORTIONS OF THE COMPOUND WHICH WERE NOT EXPOSED TO LIGHT ARE REMOVED.
Claim 2
Dependent Claim
88 words
A PROCESS FOR DEVELOPING A PRINTING PLATE COMPRISING A BASE MATERIAL HAVING A COATING THEREON COMPRISING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF IMINOQUINONE DIAZIDES AND ESTERS AND AMIDES OF BENZOQUINONE DIAZIDES AND NAPHTHOQUIONE DIAZINES WHICH COMPRISES EXPOSING THE PLATE TO LIGHT UNDER A MASTER AND TREATING THE EXPOSED PLATE WITH A DEVELOPER CONSISTING ESSENTIALLY OF A WATER INSOLUBLE ORGANIC SOLVENT EMULSIFIED IN A DILUTE AQUEOUS SOLUTION OF PHOSPHORIC ACID AND GUM ARABIC, WHEREBY THOSE PORTIONS OF THE COMPOUND WHICH WERE NOT EXPOSED TO LIGHT ARE REMOVED.
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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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |