US2560137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype photoprinting material
Assignee: GAF Chemicals Corp
•
Filing: 1948-12-21
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Granted: 1951-07-10
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Expires: 1968-12-21
Abstract
No abstract record available.
Inventors
- 👤 Sam C Slifkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:16
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
DIAZOTYPE PHOTOPRINTING MATERIAL HAVING THEREON A LIGHT SENSITIVE LAYER COMPRISING A LIGHT SENSITIVE DIAZO COMPOUND OF THE PARAPHENYLENE DIAMINE SERIES, AND AS A COUPLING COMPONENT, A MEMBER OF THE CLASS CONSISTING OF 2,7-DIHYDROXYNAPHTHALENE-3,6-DISCULFONIC ACID AND THE CORRESPONDING SULFONAMIDE.
Claim 2
Dependent Claim
38 words
DIAZOTYPE PHOTOPRINTING MATERIAL HAVING THEREON A LIGHT SENSITIVE LAYER COMPRISING A LIGHT SENSITIVE DIAZO COMPOUND OF THE PARAPHENYLENE DIAMINE SERIES, AND AS A COUPLING COMPONENT, A MEMBER OF THE CLASS CONSISTING OF 2,7-DIHYDROXYNAPHTHALENE-3,6-DISCULFONIC ACID AND THE CORRESPONDING SULFONAMIDE.
References Cited (Backward Citations)
US1989065A
Cited
US2405523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |