US2593839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype photoprinting material
Assignee: GAF Chemicals Corp
•
Filing: 1948-11-23
•
Granted: 1952-04-22
•
Expires: 1968-11-23
Abstract
No abstract record available.
Inventors
- 👤 Saul R Buc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:51
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
DIAZOTYPE PHOTOPRINTING MATERIAL, COMPRISING IN A LIGHT SENSITIVE LAYER, A LIGHT SENSITIVE DIAZO COMPONENT, AND AS A COUPLING COMPONENT, A CRYSTALLINE TETRAMERIC CONDENSATION PRODUCT OF A M-POLYHYDRIC PHENOL WITH AN EQUIMOLECULAR AMOUNT OF AN ALDEHYDE HAVING THE FORMULA RCHO, WHEREIN R IS A HYDROCARBON RADICAL HAVING 1-6 CARBON ATOMS.
Claim 2
Dependent Claim
49 words
DIAZOTYPE PHOTOPRINTING MATERIAL, COMPRISING IN A LIGHT SENSITIVE LAYER, A LIGHT SENSITIVE DIAZO COMPONENT, AND AS A COUPLING COMPONENT, A CRYSTALLINE TETRAMERIC CONDENSATION PRODUCT OF A M-POLYHYDRIC PHENOL WITH AN EQUIMOLECULAR AMOUNT OF AN ALDEHYDE HAVING THE FORMULA RCHO, WHEREIN R IS A HYDROCARBON RADICAL HAVING 1-6 CARBON ATOMS.
References Cited (Backward Citations)
GB491095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |