US2574258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive compositions and plates for photolithography
Assignee: Warren SD Co
•
Filing: 1948-04-26
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Granted: 1951-11-06
•
Expires: 1968-04-26
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Frost
- 👤 Frederic E Brinnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:08
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A SENSITIZER COMPOSITION FOR PHOTOSENSITIVE PLANORGRAPHIC PRINTING PLATES COMPRISING AN AQUEOUS VEHICLE, A WATER-SOLUBLE HEXAVALENT CHROMIUM COMPOUND OF THE GROUP CONSISTING OF CHROMATES AND DICHROMATES, A LIQUID TO SIMILIQUID, UNSATURATED, ORGANIC, OILY TO FATTY MATERIAL CAPABLE OF REACTING WITH BICHROMATE IN THE PRESENCE OF ACTINIC LIGHT TO FORM A COHERENT SOLID FILM AND A WATER-SOLUBLE PHOSPHATE, THE WEIGHT RATIO OF SAID CHROMIUM COMPOUND TO SAID MATERIAL BEING WITHIN THE RANGE FROM 1 TO 8 PARTS OF THE CHROMIUM COMPOUND TO 4 PARTS OF SAID MATERIAL, AND SAID COMPOSITION CONTAINING FROM .5 TO 3 PERCENT BY WEIGHT OF SAID PHOSPHATE AND HAVING A PH VALUE WITHIN THE RANGE FROM 3 TO 9.
Claim 2
Dependent Claim
111 words
A SENSITIZER COMPOSITION FOR PHOTOSENSITIVE PLANORGRAPHIC PRINTING PLATES COMPRISING AN AQUEOUS VEHICLE, A WATER-SOLUBLE HEXAVALENT CHROMIUM COMPOUND OF THE GROUP CONSISTING OF CHROMATES AND DICHROMATES, A LIQUID TO SIMILIQUID, UNSATURATED, ORGANIC, OILY TO FATTY MATERIAL CAPABLE OF REACTING WITH BICHROMATE IN THE PRESENCE OF ACTINIC LIGHT TO FORM A COHERENT SOLID FILM AND A WATER-SOLUBLE PHOSPHATE, THE WEIGHT RATIO OF SAID CHROMIUM COMPOUND TO SAID MATERIAL BEING WITHIN THE RANGE FROM 1 TO 8 PARTS OF THE CHROMIUM COMPOUND TO 4 PARTS OF SAID MATERIAL, AND SAID COMPOSITION CONTAINING FROM .5 TO 3 PERCENT BY WEIGHT OF SAID PHOSPHATE AND HAVING A PH VALUE WITHIN THE RANGE FROM 3 TO 9.
References Cited (Backward Citations)
US55592A
Cited
DE408097C
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US1574357A
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US1574356A
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GB205092A
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US1587274A
Cited
GB228377A
Cited
US1618931A
Cited
DE598799C
Cited
GB517686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |