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US3224878A
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Thermographic diazotype reproduction material, method of making and method of using
Assignee: Eugene Dietzgen Co
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Filing: 1961-12-01
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Granted: 1965-12-21
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Expires: 1981-12-01
Abstract
No abstract record available.
Inventors
- 👤 Robert J Klimkowski
- 👤 Amariti Luigi
- 👤 Allan D Janda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:52
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
REPRODUCTION MATERIAL WHICH COMPRISES A SUPPORTED LAYER OF A VISIBLY HEAT-SENSITIVE COMPOSITION, SAID COMPOSITION COMPRISING A MIXTURE OF A COUPLING DIAZO COMPOUND, AN AZO COUPLING COMPONENT, A COMPLEX OF CADMIUM SULFATE AND A COMPOUND PRODUCING KAN ALKALINE REACTION WHEN EHATED, SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF UREA, GUANIDINE, ALKYL SUBSTITUTED UREAS, ALKYL SUBSTITUTED GUANIDINES, HYDROXY METHYL UREA, AND HYDROXY ETHYL UREA, SAID ALKYL GROUPS CONTAINING 1 TO 4 CARBON ATOMS, THE MOL RATION OF SAID COMPOUND PRODUCING AN ALKALINE REACTION WHEN HEATED TO SAID CADMIUM SULFATE BEING FROM ABOUT 3:1 TO ABOUT 20:1, AND THE WEIGHT RATIO OF SAID COMPOUND PRODUCING AN ALKALINE REACTION WHEN HEATED TO SAID DIAZO COMPOUND BEING FROM 3-25:1.
Claim 2
Dependent Claim
116 words
REPRODUCTION MATERIAL WHICH COMPRISES A SUPPORTED LAYER OF A VISIBLY HEAT-SENSITIVE COMPOSITION, SAID COMPOSITION COMPRISING A MIXTURE OF A COUPLING DIAZO COMPOUND, AN AZO COUPLING COMPONENT, A COMPLEX OF CADMIUM SULFATE AND A COMPOUND PRODUCING KAN ALKALINE REACTION WHEN EHATED, SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF UREA, GUANIDINE, ALKYL SUBSTITUTED UREAS, ALKYL SUBSTITUTED GUANIDINES, HYDROXY METHYL UREA, AND HYDROXY ETHYL UREA, SAID ALKYL GROUPS CONTAINING 1 TO 4 CARBON ATOMS, THE MOL RATION OF SAID COMPOUND PRODUCING AN ALKALINE REACTION WHEN HEATED TO SAID CADMIUM SULFATE BEING FROM ABOUT 3:1 TO ABOUT 20:1, AND THE WEIGHT RATIO OF SAID COMPOUND PRODUCING AN ALKALINE REACTION WHEN HEATED TO SAID DIAZO COMPOUND BEING FROM 3-25:1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |