Patent US3301679A successfully refreshed from Google Patents.
US3301679A
Expired / Lapsed
US
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Two-component diazotype light-sensitive photoprinting material susceptible to thermal development
Assignee: GAF Chemicals Corp
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Filing: 1963-07-01
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Granted: 1967-01-31
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Expires: 1983-07-01
Abstract
No abstract record available.
Inventors
- 👤 Bernard I Halperin
- 👤 Mckinney John Joseph
- 👤 Jr Robert I Eldred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:18
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/61
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
TWO-COMPONENT DIAZOTYPE PHOTOPRINTING MATERIAL SUSCEPTIBLE TO DEVELOPMENT BY HEATING, HAVING ON A SURFACE OF A SUPPORTING SHEET, AN AZO COUPLING COMPONENT, A LIGHT-SENSITIVE DIAZONIUM COMPOUND, ACID STABILIZER TO PREVENT PREMATURE COUPLING, AN ACID TO NEUTRAL REAGENT WHICH IS CONVERTED ON HEATING AT A TEMPERATURE FROM 100 TO 200*C. TO AN ALKALINE REACTING COMPOUND, AND POLYVINYL ALCOHOL AT LEAST 70% UNESTERIFIED HAVING SUCH VISCOSITY CHARACTERISTICS AS TO PROVIDE IN 4% AQUEOUS SOLUTION AT 20%C. A VISCOSITY OF 2 TO 15 CENTIPOISES, SAID POLYVINYL ALCOHOL AND SAID DIAZONIUM COMPOUND BEING COMBINED IN A SINGLE LAYER IN SUCH PROPORTIONS THAT THE AMOUNT OF POLYVINYL ALCOHOL EQUALS AT LEAST THE AMOUNT OF SAID DIAZONIUM COMPOUND.
Claim 2
Dependent Claim
111 words
TWO-COMPONENT DIAZOTYPE PHOTOPRINTING MATERIAL SUSCEPTIBLE TO DEVELOPMENT BY HEATING, HAVING ON A SURFACE OF A SUPPORTING SHEET, AN AZO COUPLING COMPONENT, A LIGHT-SENSITIVE DIAZONIUM COMPOUND, ACID STABILIZER TO PREVENT PREMATURE COUPLING, AN ACID TO NEUTRAL REAGENT WHICH IS CONVERTED ON HEATING AT A TEMPERATURE FROM 100 TO 200*C. TO AN ALKALINE REACTING COMPOUND, AND POLYVINYL ALCOHOL AT LEAST 70% UNESTERIFIED HAVING SUCH VISCOSITY CHARACTERISTICS AS TO PROVIDE IN 4% AQUEOUS SOLUTION AT 20%C. A VISCOSITY OF 2 TO 15 CENTIPOISES, SAID POLYVINYL ALCOHOL AND SAID DIAZONIUM COMPOUND BEING COMBINED IN A SINGLE LAYER IN SUCH PROPORTIONS THAT THE AMOUNT OF POLYVINYL ALCOHOL EQUALS AT LEAST THE AMOUNT OF SAID DIAZONIUM COMPOUND.
Claim 3
Dependent Claim
36 words
PHOTOPRINTING MATERIAL AS DEFINED IN CLAIM 1 WHEREIN THE LIGHT-SENSITIVE DIAZONIUM COMPOUND IS CONTAINED IN ONE LAYER AND SAID ACID TO NEUTRAL REAGENT IS CONTAINED IN A SEPARATE BUT CONTIGUOUS LAYER CONTAINING AN ORGANIC FILM-FORMING POLYMER.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |