US3353984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of lightsensitive diazotype materials and improved materials prepared by such method
Assignee: Individual
•
Filing: 1964-04-15
•
Granted: 1967-11-21
•
Expires: 1984-04-15
Abstract
No abstract record available.
Inventors
- 👤 Landau Raphael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:09
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD OF PREPARING A LIGHT-SENSITIVE DIAZO-TYPE MATERIAL WHICH METHOD COMPRISES APPLYING TO A BASE MATERIAL A FIRST SOLUTION OR DISPERSION CONTAINING A DIAZONIUM COMPOUND TO FORM A FIRST COATING AND SUBSEQUENTLY APPLYING DIRECTLY OVER THE SAID FIRST COATING A SECOND SOLUTION OR DISPERSION CONTAINING A DIAZONIUM COMPOUND AND A PRECIPITANT FOR THE DIAZONIUM COMPOUND TO FORM A SECOND COATING, THE SAID SECOND COATING BEING CONTIGUOUS WITH THE FIRST COATING, SAID PRECIPITANT BEING SELECTED FROM THE GROUP CONSISTING OF THIOCYANATES, TUNGSTATES, FLUOROBORATES, SILICOFLUORATES, CHLORIDES AND SUFATES OF THE ALKALINE OR ALKALINE EARTH METALS, WATER SOLUBLE FERROCYANIDES AND SULPHONATED BENZENE OR NAPHTHALENE.
Claim 2
Independent Claim
101 words
A METHOD OF PREPARING A LIGHT-SENSITIVE DIAZO-TYPE MATERIAL WHICH METHOD COMPRISES APPLYING TO A BASE MATERIAL A FIRST SOLUTION OR DISPERSION CONTAINING A DIAZONIUM COMPOUND TO FORM A FIRST COATING AND SUBSEQUENTLY APPLYING DIRECTLY OVER THE SAID FIRST COATING A SECOND SOLUTION OR DISPERSION CONTAINING A DIAZONIUM COMPOUND AND A PRECIPITANT FOR THE DIAZONIUM COMPOUND TO FORM A SECOND COATING, THE SAID SECOND COATING BEING CONTIGUOUS WITH THE FIRST COATING, SAID PRECIPITANT BEING SELECTED FROM THE GROUP CONSISTING OF THIOCYANATES, TUNGSTATES, FLUOROBORATES, SILICOFLUORATES, CHLORIDES AND SUFATES OF THE ALKALINE OR ALKALINE EARTH METALS, WATER SOLUBLE FERROCYANIDES AND SULPHONATED BENZENE OR NAPHTHALENE.
References Cited (Backward Citations)
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US2659672A
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US2616803A
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GB864011A
Cited
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US3028240A
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US3046128A
Cited
US3102812A
Cited
US3113023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |