US2659672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype photoprinting materials
Assignee: Hall Harding Ltd
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Filing: 1948-12-21
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Granted: 1953-11-17
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Expires: 1968-12-21
Abstract
No abstract record available.
Inventors
- 👤 Leuch Werner Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:42
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A LIGHT-SENSITIVE LAYER FOR THE PRODUCTION OF A MULTI-COLORED DIAZOTYPE PHOTOGRAPHIC PRINT WHICH CONTAINS A COUPLING COMPONENT, C, AND TWO DIAZO COMPOUNDS AT LEAST ONE, B, OF WHICH IS A MEMBER OF THE GROUP CONSISTING OF DIAZO ANHYDRIDES AND DIAZO OXIDES WHICH DIAZO COMPOUND IS INCAPABLE OF FORMING A DYESTUFF WITH SAID COUPLING COMPONENT C BUT IS CAPABLE OF COUPLING WITH THE DECOMPOSITION PRODUCT, D, PRODUCED FROM B BY THE REACTION OF LIGHT AND OTHER ONE, A OF WHICH IS CAPABLE OF COUPLING WITH SAID COUPLING COMPONENT C, THE RELATIVE QUANTITIES OF THE SAID DIAZO COMPOUNDS A AND B BEING SUCH THAT THERE IS A SUBSTANTIAL DIFFERENCE IN THEIR PRINTING OUT SPEEDS.
Claim 2
Dependent Claim
112 words
A LIGHT-SENSITIVE LAYER FOR THE PRODUCTION OF A MULTI-COLORED DIAZOTYPE PHOTOGRAPHIC PRINT WHICH CONTAINS A COUPLING COMPONENT, C, AND TWO DIAZO COMPOUNDS AT LEAST ONE, B, OF WHICH IS A MEMBER OF THE GROUP CONSISTING OF DIAZO ANHYDRIDES AND DIAZO OXIDES WHICH DIAZO COMPOUND IS INCAPABLE OF FORMING A DYESTUFF WITH SAID COUPLING COMPONENT C BUT IS CAPABLE OF COUPLING WITH THE DECOMPOSITION PRODUCT, D, PRODUCED FROM B BY THE REACTION OF LIGHT AND OTHER ONE, A OF WHICH IS CAPABLE OF COUPLING WITH SAID COUPLING COMPONENT C, THE RELATIVE QUANTITIES OF THE SAID DIAZO COMPOUNDS A AND B BEING SUCH THAT THERE IS A SUBSTANTIAL DIFFERENCE IN THEIR PRINTING OUT SPEEDS.
References Cited (Backward Citations)
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Cited
US1760780A
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US1936957A
Cited
US1934011A
Cited
US2037542A
Cited
US2298444A
Cited
US2350843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |