Patent US3211686A successfully refreshed from Google Patents.
US3211686A
Expired / Lapsed
US
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Aqueous composition for prewetting a master carrying an image prepared by electrophotographic reproduction containing polyacrylic acid
Assignee: Plastic Coating Corp
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Filing: 1959-06-18
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Granted: 1965-10-12
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Expires: 1979-06-18
Abstract
No abstract record available.
Inventors
- 👤 Jay J Uber
- 👤 Hsia Shwang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:29
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A LIQUID PREWETTING COMPOSITION CAPABLE OF PRODUCING A LITHOGRAPHIC PRINTING PLATE FROM AN ELECTROPHOTOGRAPHIC MASTER BY RENDERING THE BACKGROUND AREAS OF THE SAID MASTER HYDROPHILIC IN NATURE WITHOUT AFFECTING THE HYDROPHOBIC NATURE OF ITS IMAGE AREAS WHEN IT IS APPLIED TO THE IMAGE-BEARING SURFACE OF THE SAID MASTER AS A MOISTENING FILM, AND IS A DILUTE, AQUEOUS SOLUTION WHICH CONSISTS ESSENTIALLY OF POLYACRYLIC ACID, A WATER-SOLUBLE, INORGANIC SALT SELECTED FROM THE GROUP CONSISTING OF SODIUM FERROCYANIDE, POTASSIUM FERROCYANIDE, SODIUM FERRICYANIDE AND POTASSIUM FERRICYANIDE, A BUFFER WHICH ADJUSTS THE PH OF THE SOLUTION TO A VALUE WITHIN THE RANGE OF ABOUT 3.0 TO ABOUT 7.25. AND WATER.
Claim 2
Dependent Claim
106 words
A LIQUID PREWETTING COMPOSITION CAPABLE OF PRODUCING A LITHOGRAPHIC PRINTING PLATE FROM AN ELECTROPHOTOGRAPHIC MASTER BY RENDERING THE BACKGROUND AREAS OF THE SAID MASTER HYDROPHILIC IN NATURE WITHOUT AFFECTING THE HYDROPHOBIC NATURE OF ITS IMAGE AREAS WHEN IT IS APPLIED TO THE IMAGE-BEARING SURFACE OF THE SAID MASTER AS A MOISTENING FILM, AND IS A DILUTE, AQUEOUS SOLUTION WHICH CONSISTS ESSENTIALLY OF POLYACRYLIC ACID, A WATER-SOLUBLE, INORGANIC SALT SELECTED FROM THE GROUP CONSISTING OF SODIUM FERROCYANIDE, POTASSIUM FERROCYANIDE, SODIUM FERRICYANIDE AND POTASSIUM FERRICYANIDE, A BUFFER WHICH ADJUSTS THE PH OF THE SOLUTION TO A VALUE WITHIN THE RANGE OF ABOUT 3.0 TO ABOUT 7.25. AND WATER.
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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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |