Patent US3231382A successfully refreshed from Google Patents.
US3231382A
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US
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Printing plate compositions
Assignee: Union Carbide Corp
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Filing: 1964-04-03
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Granted: 1966-01-25
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Expires: 1984-04-03
Abstract
No abstract record available.
Inventors
- 👤 Julius L Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0926; C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C08L71/00; C08L71/02; G03F; G03F7/00; G03F7/004; G03F7/039
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A PHOTOSENSITIVE COMPOSITION CONSISTING ESSENTIALLY OF (1) A HEAT FUSIBLE PHENOLIC RESIN, (2) FROM ABOUT 0.2 TO 3 PARTS PER PART PHENOLIC RESIN OF AN ETHYLENE OXIDE POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT FROM ABOUT 50,000 TO ABOUT 10,000,000, (3) FROM ABOUT 0.08 TO ABOUT 0.2 PART PER PHENOLIC RESIN OF A PHOTOSENSITIZING AGENT WHICH WHEN ACTED UPON BY LIGHT ENERGY AT AMBIENT TEMPERATURES YIELDS FREE RADICALS CAPABLE OF REACTION WITH THE RESINOUS COMPONENTS OF THE COMPOSITION WHEREIN SAID PHOTOSENSITIVE COMPOSITION BECOMES MORE OLEOPHILIC ON EXPOSURE TO LIGHT, (4) FROM ABOUT 1 TO ABOUT 50 WEIGHT PERCENT BASED UPON THE WEIGHT OF THE PHENOLIC RESIN OF A NON-OXISIZING, PHOTO-INSENSITIVE, BASIC COMPOUND WHICH EXHIBITS A PH GREATER THAN 7, AND (5) AN AMOUNT UP TO ABOUT 0.4 PART PER PART PHENOLIC RESIN OF A PLYHYDRIC AROMATIC COMPOUND CONTAINING FROM 6 TO 12 CARBON ATOMS AND FROM 2 TO 4 AROMATIC HYDROXYL GROUPS SO DISPOSED THAT SAID PLYHYDRIC AROMATIC COMPOUND CONTAINS AT LEAST 2 REACTIVE AROMATIC HYDROGEN ATOMS.
Claim 2
Dependent Claim
166 words
A PHOTOSENSITIVE COMPOSITION CONSISTING ESSENTIALLY OF (1) A HEAT FUSIBLE PHENOLIC RESIN, (2) FROM ABOUT 0.2 TO 3 PARTS PER PART PHENOLIC RESIN OF AN ETHYLENE OXIDE POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT FROM ABOUT 50,000 TO ABOUT 10,000,000, (3) FROM ABOUT 0.08 TO ABOUT 0.2 PART PER PHENOLIC RESIN OF A PHOTOSENSITIZING AGENT WHICH WHEN ACTED UPON BY LIGHT ENERGY AT AMBIENT TEMPERATURES YIELDS FREE RADICALS CAPABLE OF REACTION WITH THE RESINOUS COMPONENTS OF THE COMPOSITION WHEREIN SAID PHOTOSENSITIVE COMPOSITION BECOMES MORE OLEOPHILIC ON EXPOSURE TO LIGHT, (4) FROM ABOUT 1 TO ABOUT 50 WEIGHT PERCENT BASED UPON THE WEIGHT OF THE PHENOLIC RESIN OF A NON-OXISIZING, PHOTO-INSENSITIVE, BASIC COMPOUND WHICH EXHIBITS A PH GREATER THAN 7, AND (5) AN AMOUNT UP TO ABOUT 0.4 PART PER PART PHENOLIC RESIN OF A PLYHYDRIC AROMATIC COMPOUND CONTAINING FROM 6 TO 12 CARBON ATOMS AND FROM 2 TO 4 AROMATIC HYDROXYL GROUPS SO DISPOSED THAT SAID PLYHYDRIC AROMATIC COMPOUND CONTAINS AT LEAST 2 REACTIVE AROMATIC HYDROGEN ATOMS.
References Cited (Backward Citations)
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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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |