US2662013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype photoprinting material
Assignee: GAF Chemicals Corp
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Filing: 1951-07-18
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Granted: 1953-12-08
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Expires: 1971-07-18
Abstract
No abstract record available.
Inventors
- 👤 Jr John Sulich
- 👤 Joseph E Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A PROCESS FOR PREPARING DIAZOTYPE PHOTOPRINTING MATERIAL, WHICH COMPRISES PRECOATING A BASE MATERIAL WITH A SUSPENSION OF NON-COLLOIDAL FINELY DIVIDED SILICA IN AN AQUEOUS SOLUTION OF A FILM-FORMING LYOPHILE BASIC-TO-AMPHOTERIC NITROGENOUS POLYMERIC BINDER CAPABLE OF REACTING WITH AN AZO DYE COUPLING COMPONENT CONTAINING A HYDROXYL GROUP SELECTED FROM THE CLASS CONSISTING OF PHENOLIC AND ENOLIC HYDROXYL GROUPS, THE WEIGHT RATIO OF THE SILICA TO SAID BINDER IN SAID SUSPENSION BEING FROM 1:1 TO 3:1, SAID FINELY DIVIDED NON-COLLOIDAL SILICA BEING DEHYDRATED SILICIC ACID PRECIPITATED FROM AQUEOUS SOLUTION, HAVING A PARTICLE SIZE RANGE OF 0.1 TO 10 MICRONS AND A WEIGHT AVERAGE PARTICLE SIZE OF 1 TO 5 MICRONS, DRYING THE COATING, AND IMPREGNATING THE RESULTING COATED SURFACE WITH A TWO-COMPONENT DIAZOTYPE SENSITIZING COMPOSITION CONTAINING A LIGHTSENSITIVE DIAZO COMPOUND AND AN AZO COUPLING COMPONENT CONTAINING A HYDROXYL GROUP SELECTED FROM THE CLASS CONSISTING OF PHENOLIC AND ENOLIC HYDROXYL GROUPS.
Claim 2
Dependent Claim
148 words
A PROCESS FOR PREPARING DIAZOTYPE PHOTOPRINTING MATERIAL, WHICH COMPRISES PRECOATING A BASE MATERIAL WITH A SUSPENSION OF NON-COLLOIDAL FINELY DIVIDED SILICA IN AN AQUEOUS SOLUTION OF A FILM-FORMING LYOPHILE BASIC-TO-AMPHOTERIC NITROGENOUS POLYMERIC BINDER CAPABLE OF REACTING WITH AN AZO DYE COUPLING COMPONENT CONTAINING A HYDROXYL GROUP SELECTED FROM THE CLASS CONSISTING OF PHENOLIC AND ENOLIC HYDROXYL GROUPS, THE WEIGHT RATIO OF THE SILICA TO SAID BINDER IN SAID SUSPENSION BEING FROM 1:1 TO 3:1, SAID FINELY DIVIDED NON-COLLOIDAL SILICA BEING DEHYDRATED SILICIC ACID PRECIPITATED FROM AQUEOUS SOLUTION, HAVING A PARTICLE SIZE RANGE OF 0.1 TO 10 MICRONS AND A WEIGHT AVERAGE PARTICLE SIZE OF 1 TO 5 MICRONS, DRYING THE COATING, AND IMPREGNATING THE RESULTING COATED SURFACE WITH A TWO-COMPONENT DIAZOTYPE SENSITIZING COMPOSITION CONTAINING A LIGHTSENSITIVE DIAZO COMPOUND AND AN AZO COUPLING COMPONENT CONTAINING A HYDROXYL GROUP SELECTED FROM THE CLASS CONSISTING OF PHENOLIC AND ENOLIC HYDROXYL GROUPS.
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) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |