US3373115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning solution for printing plates
Assignee: Azoplate Corp
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Filing: 1964-10-01
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Granted: 1968-03-12
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Expires: 1984-10-01
Abstract
No abstract record available.
Inventors
- 👤 Steppan Hartmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:22
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR REMOVING UNDESIRED TONE FROM THE NON-IMAGE AREAS OF A NEGATIVE-WORKING PLANOGRAPHIC PRINTING PLATE WHICH COMPRISES TREATING THE PLATE WITH A SOLUTION CONSISTING ESSENTIALLY OF EFFECTIVE AMOUNTS OF AN ORGANIC SOLVENT CAPABLE OF DISSOLVING LACQUERS AND GREASY INK, AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, HYDROBROMIC ACID, AND SALTS OF SUCH ACIDS WITH A BASE SELECTED FROM THE GROUP CONSISTING OF AMMONIA, HYDROXYAMINE, HYDRAZINE, AND AROMATIC AMINES AND CARBOXYLIC ACID AMIDES HAVING A DISSOCIATION CONSTANT LESS THAN 10-3 AT 25*C., THE COMPOUND BEING PRESENT IN THE SOLUTION IN A QUANTITY OF 0.01 TO 10 EQUIVALENTS PER LITER OF TOTAL SOLUTION.
Claim 2
Dependent Claim
106 words
A PROCESS FOR REMOVING UNDESIRED TONE FROM THE NON-IMAGE AREAS OF A NEGATIVE-WORKING PLANOGRAPHIC PRINTING PLATE WHICH COMPRISES TREATING THE PLATE WITH A SOLUTION CONSISTING ESSENTIALLY OF EFFECTIVE AMOUNTS OF AN ORGANIC SOLVENT CAPABLE OF DISSOLVING LACQUERS AND GREASY INK, AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, HYDROBROMIC ACID, AND SALTS OF SUCH ACIDS WITH A BASE SELECTED FROM THE GROUP CONSISTING OF AMMONIA, HYDROXYAMINE, HYDRAZINE, AND AROMATIC AMINES AND CARBOXYLIC ACID AMIDES HAVING A DISSOCIATION CONSTANT LESS THAN 10-3 AT 25*C., THE COMPOUND BEING PRESENT IN THE SOLUTION IN A QUANTITY OF 0.01 TO 10 EQUIVALENTS PER LITER OF TOTAL SOLUTION.
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |