US2624672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive printing plate having a light-sensitive coating consisting of a colloid, a phosphate, and a chromium compound
Assignee: Warren SD Co
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Filing: 1948-03-01
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Granted: 1953-01-06
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Expires: 1968-03-01
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Frost
- 👤 Frederic E Brinnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:08
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PHOTO-SENSITIVE PLATE COMPRISING A BASE HAVING A PLANOGRAPHIC PRINTING SURFACE AND A COATING THEREON CONSISTING OF THE DRIED RESIDUE OF AN AQUEOUS MIXTURE CONSISTING ESSENTIALLY OF A LIGHT SENSITIVE COLLOID COMPRISING A PROTEIN, A WATER-SOLUBLE CHROMIUM COMPOUND OF THE GROUP CONSISTING OF CHROMATES AND DICHROMATES AND A WATER-SOLUBLE PHOSPHATE A DILUTE AQUEOUS SOLUTION OF WHICH HAS A PH VALUE ABOVE THE ISOELECTRIC POINT OF THE PROTEIN, THE RATIO OF CHROMIUM COMPOUND TO PROTEIN BEING WITHIN THE RANGE FROM 1 PART OF CHROMIUM COMPOUND TO FROM 1 TO 3 PARTS OF PROTEIN AND THE RATIO OF PHOSPHATE TO PROTEIN BEING WITHIN THE RANGE OF FROM 15 TO 50 PARTS OF PHOSPHATE TO 100 PARTS OF PROTEIN.
Claim 2
Dependent Claim
116 words
A PHOTO-SENSITIVE PLATE COMPRISING A BASE HAVING A PLANOGRAPHIC PRINTING SURFACE AND A COATING THEREON CONSISTING OF THE DRIED RESIDUE OF AN AQUEOUS MIXTURE CONSISTING ESSENTIALLY OF A LIGHT SENSITIVE COLLOID COMPRISING A PROTEIN, A WATER-SOLUBLE CHROMIUM COMPOUND OF THE GROUP CONSISTING OF CHROMATES AND DICHROMATES AND A WATER-SOLUBLE PHOSPHATE A DILUTE AQUEOUS SOLUTION OF WHICH HAS A PH VALUE ABOVE THE ISOELECTRIC POINT OF THE PROTEIN, THE RATIO OF CHROMIUM COMPOUND TO PROTEIN BEING WITHIN THE RANGE FROM 1 PART OF CHROMIUM COMPOUND TO FROM 1 TO 3 PARTS OF PROTEIN AND THE RATIO OF PHOSPHATE TO PROTEIN BEING WITHIN THE RANGE OF FROM 15 TO 50 PARTS OF PHOSPHATE TO 100 PARTS OF PROTEIN.
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) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |