US3231377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive compositions containing polyethylene oxide, a phenolic resin, and a photosensitive compound and process for producing printing plates therefrom
Assignee: Union Carbide Corp
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Filing: 1963-07-01
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Granted: 1966-01-25
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Expires: 1983-07-01
Abstract
No abstract record available.
Inventors
- 👤 Barry L Dickinson
- 👤 Julius L Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:10
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0381; C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C08L71/00; C08L71/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PHOTOGRAPHIC PROCESS WHICH COMPRISES EXPOSING A FILM OF A PHOTOSENSITIVE COMPOSITION COMPRISING (1) FROM ABOUT 0.3 TO 3.0 PARTS BY WEIGHT OF A WATER SOLUBLE ETHYLENE OXIDE POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 50,000 TO ABOUT TEN MILLION, PER PART OF (2) A HEAT FUSIBLE PHENOLIC RESIN; AND (3) FROM ABOUT 0.08 TO ABOUT 0.2 PART BY WEIGHT PER PART PHENOLIC RESIN OF A PHOTOSENSITIZING COMPOUND, WHICH WHEN ACTED UPON BY LIGHT ENERGY AT AMBIENT TEMPERATURE, YIELDS FREE RADICALS CAPABLE OF REACTION WITH SAID PHENOLIC RESIN, TO LIGHT OF SELECTED INTENSITY IN ACCORDANCE WITH AN IMAGE AND DEVELOPING THE EXPOSED FILM WITH WATER.
Claim 2
Dependent Claim
107 words
A PHOTOGRAPHIC PROCESS WHICH COMPRISES EXPOSING A FILM OF A PHOTOSENSITIVE COMPOSITION COMPRISING (1) FROM ABOUT 0.3 TO 3.0 PARTS BY WEIGHT OF A WATER SOLUBLE ETHYLENE OXIDE POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 50,000 TO ABOUT TEN MILLION, PER PART OF (2) A HEAT FUSIBLE PHENOLIC RESIN; AND (3) FROM ABOUT 0.08 TO ABOUT 0.2 PART BY WEIGHT PER PART PHENOLIC RESIN OF A PHOTOSENSITIZING COMPOUND, WHICH WHEN ACTED UPON BY LIGHT ENERGY AT AMBIENT TEMPERATURE, YIELDS FREE RADICALS CAPABLE OF REACTION WITH SAID PHENOLIC RESIN, TO LIGHT OF SELECTED INTENSITY IN ACCORDANCE WITH AN IMAGE AND DEVELOPING THE EXPOSED FILM WITH WATER.
References Cited (Backward Citations)
No citation records indexed.
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 |