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US2504593A
Expired / Lapsed
US
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Light-sensitive anthraquinone sulfonic acid photoprinting material containing a cupric salt
Assignee: GAF Chemicals Corp
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Filing: 1946-05-18
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Granted: 1950-04-18
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Expires: 1966-05-18
Abstract
No abstract record available.
Inventors
- 👤 Schoen Alice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:40
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PHOTOPRINTING MATERIAL COMPRISING A LIGHT-SENSITIVE LAYER ON A SUITABLE CARRIER CONTAINING CUPRIC FORMATE AND A MEMBER OF THE GROUP CONSISTING OF ANTHRAQUINONE 2,6-DISULFONIC ACID, ANTHRAQUINONE 2,7-DISULFONIC ACID AND THE ALKALIMETAL SALTS THEREOF.
Claim 2
Dependent Claim
33 words
A PHOTOPRINTING MATERIAL COMPRISING A LIGHT-SENSITIVE LAYER ON A SUITABLE CARRIER CONTAINING CUPRIC FORMATE AND A MEMBER OF THE GROUP CONSISTING OF ANTHRAQUINONE 2,6-DISULFONIC ACID, ANTHRAQUINONE 2,7-DISULFONIC ACID AND THE ALKALIMETAL SALTS THEREOF.
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) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |