Patent US3248220A successfully refreshed from Google Patents.
US3248220A
Expired / Lapsed
US
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Two-component diazotype material
Assignee: Chemische Fabriek L Van der Grinten NV
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Filing: 1962-11-20
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Granted: 1966-04-26
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Expires: 1982-11-20
Abstract
No abstract record available.
Inventors
- 👤 Wilhelmus Josephus Van Rhijn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/60; G01; G01R; G01R19/00; G03C1/50; G03C1/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
TWO-COMPONENT DIZOTYPE MATERIAL, IN WHICH ARE PRESENT A LIGHT-SENSITIVE BENZENE DIAZONIUM COMPOUND HAVING A TERTIARY AMINO GROUP IN A PARA-POSITION WITH RESPECT TO THE DIAZO GROUP, AN AZO COUPLING COMPONENT SELECTED FROM THE CLASS CONSISTING OF 2,3-DIHYDROXYNAPHITHALENE AND 2,3-DIHYDROXYNAPHITHALENE 6-SULPHONIC ACID AND WATER-SOLUBLE SALTS THEREOF, A WATER-SOLUBLE STABLE ZINC SALT, AND AN ESSENTIALLY COLOURLESS NON-COUPLING BENZIMIDAZOLE WHICH IN THE FORM OF IS HYDROCHLORIDE IS AT LEAST 0.5%, BY WEIGHT, SOLUBLE IN WATER AND WHICH HAS A GENERAL FORMULA SELECTED FROM THE CLASS CONSISTING OF:
Claim 2
Dependent Claim
84 words
TWO-COMPONENT DIZOTYPE MATERIAL, IN WHICH ARE PRESENT A LIGHT-SENSITIVE BENZENE DIAZONIUM COMPOUND HAVING A TERTIARY AMINO GROUP IN A PARA-POSITION WITH RESPECT TO THE DIAZO GROUP, AN AZO COUPLING COMPONENT SELECTED FROM THE CLASS CONSISTING OF 2,3-DIHYDROXYNAPHITHALENE AND 2,3-DIHYDROXYNAPHITHALENE 6-SULPHONIC ACID AND WATER-SOLUBLE SALTS THEREOF, A WATER-SOLUBLE STABLE ZINC SALT, AND AN ESSENTIALLY COLOURLESS NON-COUPLING BENZIMIDAZOLE WHICH IN THE FORM OF IS HYDROCHLORIDE IS AT LEAST 0.5%, BY WEIGHT, SOLUBLE IN WATER AND WHICH HAS A GENERAL FORMULA SELECTED FROM THE CLASS CONSISTING OF:
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |